441. Altman

560. Mikey T.

450. Red

503. Jada Jet

725. Dante

Not quite a day but close enough

Adding letters/number to answers as chosen by Random Number Generator. Letter (*) and number (#) patterns below. If there is a forward slash, the first name is the code name and the second name is the real name (for such characters I'll accept either name).  Not every number appears in this collage but every letter does. Obviously if a letter is revealed but not shown for a particular character, they don't have that letter in their name.

Adding the letter A.

Letters/numbers found so far: ABCDEFGIJKLMNPTVWXZ245780

369. Earlier show; security head turned terrorist; Superman: The Animated Series; works for a major villain from the comics on both shows ME*C* G*AVE*
371. Original; judge; killed by someone whose trial she presided over T*E*E*A **WA*D
372. Original; high school teacher; statutory rapist *AM*EL  BE*NA*D
373. Comics (this version's surname missing a syllable); journalist; The Flash; won a Pullitzer  MA**N  BRIDGE
374. Original; cultist; escaped a raid on boss' lair initially  AC*L*TE /  C*AIG
376. Original; weapons dealer; led a street gang  B**N*  M**ETTI
377. Original; firefighter; fire department including her is recurring  TAME*A  DALLE*
380. Original; student if any; parents killed by assassin  TA*L**  M***E
382. Original; police officer, cultist; posed as his cult leader and kidnapped a cast character  DAIL* [LOCKED; characters found at time of locking: ABCDEFGIJKLMNPTVWXZ245780]
383. Comics; CEO, businessman, shipping magnate; Green Arrow; took bribes to allow drug smuggling  MA*TIN **ME**
384. Original; firefighter; got doused in turpentine DANN* DE LA VEGA [LOCKED; characters found at time of locking: ABCDEFGIJKLMNPTVWXZ245780]
385. Real person; newscaster; played by herself, though real person reports out of a different city  LE*NA NG**EN
386. Slightly earlier (same episode) character this continuity; unrevealed; counterpart of Earth-1 version of character, though this version unnamed  *A**I**N  **E*L***E WELL*'  FIFT* EX-WIFE (EA*T*- T*D##)
387. Comics, though comics version's real name is unknown; criminal; All-Flash; absorbs kinetic energy  T**TLE /  ****ELL  GL*****
390. Original; unrevealed; flirted with cast character I*MA ***E
391. Comics; unrevealed; Teen Titans Special; mother of major character's half sister  KAZ*MI ADAC*I
392. Mostly original, though name a nod to a real person; crime boss; has been to a baseball arena  **INTA**  **IM**A*A
393. Comics; mercenary; Nightwing; hired to kill the main villain of the season  G*ILLE*M*  BA**E*A
396. Original; Italian restaurant owner; homophobic  ALE**AND**
397. Original; criminal; blackmail and threatened the life of someone CLA*  *TANLE*
398. Mostly original; surname possible reference to comics character and definitely to real person; arms dealer; possibly Swamp Thing; undead villain  MITC*  **ME**
399. Original; pizza place owner; hates aliens  MA**IM*
400. Original; possible but unconfirmed connection to earlier character; prison guard; active in 2049  T*EV**  **INICK
402. Original; student turned assassin; kidnapped by extreme sect  TALIBA* / ME*I  NATIFA*
403. Original; government agent; worked with the main villain of the season  J**DAN  PIE*CE
404. Original; field agent; removed a villain's stinger from their victim's body *A*TMANN
406. Original; high school student; son of a recurring villain *WEN P**T
407. Original but looks like someone from another Earth previously seen; assistant geologist; travelled between Earths MA*A (EA*T*-7##)
408. Comics (indirectly); inapplicable; Batman; programmed with personality of user's father; note: this character once had an Arrwoverse Wiki profile but it got deleted  L*CI** F*X (A.I.)
409. Original; personal assistant; host of alien consciousness I*MA *A**E*
413. Real person; musician; performed at night club opening and was played by himself *TEVE A*KI
414. Comics (has different code name with same meaning); assassin; possibly Green Arrow; his team was allied with major villain BEA*
415. Original; spy; proficient in air radio terminology ALAN D**AND
416. Slightly earlier (same episode) character this continuity; unrevealed; married the same person twice but divorced them both times *A**I**N **E*L***E WELL*' F***T* EX-WIFE (EA*T*-T*D#0)
417. Real person; presumed watercolourist if same as real version; sister of a famous female novelist CA**AND*A A**TEN
418. Original; police detective; took part in getting innocents convicted *T* D*NNELL*
419. Original; unrevealed; because friends with a cast character after they moved to their town for a time LA**A **FFMAN
420. Comics; criminal; All-American Comics; created giant version of recurring toy character *A*G*N T*E ***CE*E*
421. Original, but related to comics based character; actor, secret society leader; great-great-grandfather of cast character *EN** *TEIN
423. Earlier character this continuity; unrevealed; read a poem about bread *.P. WELL* (EA*T*-25)
424. Comics; police detective; The Flash; partner (in the job sense) of cast character F*ED C***E
425. Original; unrevealed; uncle of cast character *IC*
428. Slightly earlier (same episode) character this continuity; arsonist; mistaken for visiting counterpart from another Earth EDDIE *LICK (EA*T*-#)
429. Comics; head of IT, former hacktivist; OMAC; helped create (computer) super-virus with roommate and a cast character M***N F**E*T
430. Comics (comics version has different codename); scientist; Showcase; hero in comics, villain in show with another hero's powers **VIET FI*E*T**M (VALENTINA V**T*K)
431. Real person; jazz guitarist; killed by minotaur in erased timeline DJANG* *EIN*A*DT
432. Comics (comics version's surname has one fewer syllable); psychiatrist; Justice League of America; used a book to warp reality J**N DEEGAN
433. Original; accountant; actions led to extortion, kidnapping, and murder *A**LD BACKMA*
434. Comics (though this version's real name unrevealed); handmaiden, etc.; Strange Adventures; believed by major character to have been banned from meddling with mortals ENC*ANT*E**
436. Comics (individual based on a race); presumed criminal; Guy Gardner: Warrior; sentenced by main character's mother T**M*CK
439. Original; inventor, motorcyclist; invented new carburetor for shovelhead motorcycles CAL DEVIT* [LOCKED; characters found at time of locking: ABCDEFGIJKLMNPTVWXZ245780]
440. Original; unrevealed; mother of cast characters NA**EEN TA*A*ZI
442. Original; high school student; family moved due to father's imprisonment TEGAN WICK*EM  [LOCKED; characters found at time of locking: ABCDEFGIJKLMNPTVWXZ245780]
443. Original; corportation founder, inventor; main villain of a season; likes to sing BI***P
444. Original; doctor, metalsmith; outfitted cast character in Samurai armour IC*I** *AMA**I**
445. Original, though name evokes movie characters; high school graduate; wrongly believed to be a killer in one timeline F*EDD* ME*E**
446. Original; unrevaled; fostered alien child for a time DANA F**D
447. Comics (slightly different name); high school student; Steel; from another Earth and has no counterpart on main Earth due to counterpart parents never getting together NATALIE LANE  I**N* (EA*T*- T*D22)
449. Original; personal assistant/double agent; fired by boss for spying on behalf of boss' mother ALANA (L-C**P)
451. Possibly comics; university student, stripper; Adventure Comics; daughter of cast character  J*ANIE  [LOCKED; characters found at time of locking: ABCDEFGIJKLMNPTVWXZ245780]
452. Comics (comics version has different real surname); field supervisor; The Flash; has superhuman strength, etc.  F*E*ZA /  ALEX*  *IVE*A
453. Comics; prison chief psychiatrist, criminal; The Flash; commaneded guards to inject main character with truth serum JA**ETT PA*KE*
454. Earlier character this continuity; unrevealed; appeared after solving an equation *A**I**N  WELL* (EA*T*- T*D2)
455. Comics; TV new reporter turned sports journalist; The Flash; dated a main character for a time and has evil counterpart on another Earth LINDA PA*K  [LOCKED; characters found at time of locking: ABCDEFGIJKLMNPTVWXZ245780]
456. Original; prison warden; fired for misuse of prisoners W*ATT K*TE
457. Original; personal accountant; is a demon and possibly hasn't been to Earth TIBE*I**
460. Original; unrevealed; mother of a cast character I*ABEL NAL  [LOCKED; characters found at time of locking: ABCDEFGIJKLMNPTVWXZ245780]
463. Apparently original, though related to real person; unrevealed; uncle of famous musician L*CI*** P*E*LE*
464. Earlier character this continuity; unrevealed; in prison camp for being Jewish FElICIT*  *M*AK'*  EA*T*-X  D*PPELGÄNGE*
466. Comics; none; Convergence: Superman; erased from existence and replaced with much older person of same name  J*N*T*AN KENT (**E- C*I*I*)
468. Comics; prison warden; Bite Club; seen mainly in darkness, hinting she might be a vampire as per the comics version DEL T***
471. Comics (indirectly/different first name); terrorist; Supergirl; counterpart of hero/former cast character  T**M*N / WINN  *C**TT (EA*T*- T*D##)
472. Folklore (possibly real person but if so heavily embellished); knight; possibly Queste del Saint Graal; another hero used his sword to save his kingdom from super-villains GALA*AD   [LOCKED; characters found at time of locking: ABCDEFGIJKLMNPTVWXZ245780]
473. Original; psychologist; treated a cast character PA*K   [LOCKED; characters found at time of locking: ABCDEFGIJKLMNPTVWXZ245780]
474. Original; judge; precided over trial of a cast character (but not main character)  B*ACKETT
475. Comics; criminal; The Flash Secret Files and Origins; counterpart of a police captain  *ING* (EA*T*-2)
477. Comics; iron works employee turned criminal; The Flash: Iron Heights; super-villain killed and then brought back briefly as undead foe  GI*DE* / T*N*  W**D*A*D
478. Comics (indirectly); unrevealed to the extent applicable; Action Comics; counterpart of sorts to relative of cast chatracters ALEX  DANVE**'  **T*E* (*B*IDIAN  PLATIN*M)
479. Original; criminal gang leader; used alien tech in crimes C*ET MINE*
480. Original; government agent; recurring ally of cast characters  VA***EZ (EA*T*-#8)
481. Original; high school student when last seen; close friend of cast character during teen years J**IE
482. Original; district attorney; questioned main character during his or her trial ALEX* VAN **EN
485. Comics; criminal; Robin Annual; could morph hands into blades *AZ****A*P /  *AELENE  **A*P
487. Original; unrevealed; villager in an African nation  F**IN**L*
490. Original; crime boss; killed by gaseous villain A*AZ  DA*BIN*A*
491. Original; government agent; hunted a villain who killed him  *E*N*LD*
492. Original; unrevealed; killed by parasitic villain *NNAMED  **APE-**IFTE*
493. Original; high school student when last seen; cast character secretly has a crush on her as a teen  VICKI D*NA**E
494. Original; slave turned spy; tasked with stealing battle plans from an enemy *EN** *C*TT
495. Original; engineer; super-villain tried to take him captive CA*L  [LOCKED; characters found at time of locking: ABCDEFGIJKLMNPTVWXZ245780]
496. Earlier character this continuity; unrevealed; resides in bottled Earth A*ALA'*  EA*T*-T*D#7 D*PPELGÄNGE*
497. Original; counseling director; disliked for strict methods in running camp PA*LA C**PE*
498. Original; some sort of criminal boss; mother of cast character's children KA*LA  [LOCKED; characters found at time of locking: ABCDEFGIJKLMNPTVWXZ245780]
499. Earlier show (indirectly); timeline protector; The Secrets of Isis; counterpart of sorts of cast character, though unlike main version has tattoos ZA*I TA*AZI (**B*T)
500. Original; restaurant co-owner/waitress; harassed by someone wanting protection money JENN* *****
502. Earlier show; unrevealed, arguably some sort of teacher; Batman: The Brave and the Bold; trapped someone in an artificial reality M**IC MEI*TE*
504. Real person or comics depending on how you look at it; unrevealed; Flash Comics; resident of Iowa City during some period of the 20th century K**F*'* ##4# *EINCA*NATI*N
506. Comics; presumed criminal; Nightwing; helped stop a drone strike T****E
507. Comics going by character in general, earlier show going by specific name; founder/CEO;  Superman's Girl Friend, Lois Lane but this name from Smalllville; father of major villain  LI*NEL L*T***
508. Real person; senator; betrayed his best friend; this betrayal was chronicled by someone else in this collage in the real world B**T**
509. Comics (different first name; two possibilties for comics countpart with one having a closer first name); lieutenant turned resistance member; DC Universe Presents or Villains United; daughter of main villain of a season CA**A*D*A *AVAGE
510. Comics; museum owner/future currator; The Flash; will eventually curate a museum devoted to a main character DEXTE* M*LE*
511. Comics; CEO; The Power Company; had nannite-created powers BI*MAX /  JACK *P*EE*
513. Original; server; played Dungeons & Dragons with cast character MA*C*
514. Comics; district attorney; The Flash; prosecuted main character in trial ANT*N *LATE*
519. Original; technology expert; tried unsuccessfully to help get someone back to their home Earth DAVID C*IN [LOCKED; characters found at time of locking: ABCDEFGIJKLMNPTVWXZ245780]
520. Original; unrevealed; childhood bully of major villain JE**E FEDE*IC*
521. Original; senator; initially had anti-alien views MI*ANDA C*ANE [LOCKED; both remaining letters the same; characters found at time of locking: ABCDEFGIJKLMNPTVWXZ245780]
522. Original; nation's President; gave a speech on a late hero **A*
524. Original; event coordinator and moderator; arranged romance novel convention in Seattle TAMM* [LOCKED; characters found at time of locking: ABCDEFGIJKLMNPTVWXZ245780]
525. Comics; police sergeant and task force leader turned criminal; 1st Issue Special; led an anti-vigilate task force before going rogue LIZA WA*NE* [LOCKED; both remaining letters the same; characters found at time of locking: ABCDEFGIJKLMNPTVWXZ245780]
532. Comics; military sergeant and bomb defusal specialist; The Fury of Firestorm; could spontaneously combust objects upon physical contact PLA*TI**E /  BETTE *AN* ***Ci
534. Original; student, also vigilante in one future; legacy villain in erased future CiCADA /  G*ACE GIBB*N*
535. Original; unrevealed, likely student if any; from a post-Soviet country MIK*AIL [LOCKED; characters found at time of locking: ABCDEFGIJKLMNPTVWXZ245780]
536. Comics (indirectly); timeline protector; Justice Society of America; has super strength and durability NATE *E****D (**B*T)
537. Earlier character this continuity; posed as police officer; replaced somene captured in an elevator DAI** K**BE* (MI****VE**E)
539. Original; investor; invested in an attempt to make a museum *LGA [LOCKED; characters found at time of locking: ABCDEFGIJKLMNPTVWXZ245780]
541. Original; government agent; electrocuted underwater ALEX ***TT
542. Original; mercenary arsonist; crew fought off two superheroes before being defeated CAME**N AB*AM*    
543. Original; psychologist; kidnapped by group run by villain wanting advice MAL*NE [LOCKED; characters found at time of locking: ABCDEFGIJKLMNPTVWXZ245780]
544. Comics (indirectly); company owner; Justice League of America ; husband of counterpart of main character's mother MALC*LM ME*L*N (EA*T*-2)
545. Original; army leader; alien who helped try to take over the Earth T*E C*MMANDE*
546. Original; slave; whipped for accidentally burning cloth prior to being freed by heroes MA**
547. Original; actor; posed as father of cast character *AND* **A*PE
548. Original; being specific would reveal most of the answer, but some sort of mayor aide; affected by some sort of outbreak at City Hall C*IEF *F *TAFF IN NATI*NAL CIT*
549. Comics (comics version has no first name); bodyguard; Green Arrow: Year One; bodyguard to main character's father DAVE *ACKETT [LOCKED; characters found at time of locking: ABCDEFGIJKLMNPTVWXZ245780]
550. Original; controlled demolitionist, terrorist; accidentally killed children in building detonation ALEX FA**T
551. Comics; reformed criminal; The Flash; powers include telephathy, empathy, fear inducement, illusion inducement P**C* /  BA**I* MALIK
552. Original; housewife; wife of major villain L*DIA L*CK***D
553. Original; security agent; ex-husband of cast character T*LE*
554. Original; government agent; hunted a villain who killed him T**NG
555. Original with some comics elements. This one's a bit complicated. In one sense this is a separate character than one seen earlier (which is how Arrowverse Wiki originally treated them as) but subsequent evidence (from after I created this collage) places them more as the earlier character themself (previously found); adventurer as such; Flash Comics (comics elements); if separate character, they share DNA of a major character mixed with an alien's *A*A LANCE (CL*NE)
557. Original; high school student; ex-boyfriend of cast character *EAN *MIT*
558. Original; likely student of any; son of a later superhero AKI* *AMA**I**
561. Original; bartender, alien rights activist; ran group therapy sessions for aliens *I*NA B**NE
563. Original; child trafficker; kidnapped main character while latter still a kid CANDICE L*NG [LOCKED; characters found at time of locking: ABCDEFGIJKLMNPTVWXZ245780]
567. Original; company vice president; helped foot bill for free medical event EVAN WENDE*
[LOCKED; characters found at time of locking: ABCDEFGIJKLMNPTVWXZ245780]
568. Comics unnamed, radio show named; vigilante; Action Comics, named in The Adventures of Superman; killed by counterpart of main character JAME* *L*EN'* EA*T*-X D*PPELGÄNGE* (one letter has accent)
569. Original; drug dealer; sold drag that turned people into rage monsters KE*IN **GGIN*
570. Comics; vigilante; Action Comics; alien who wears something with extra-dimensional properties *AT [LOCKED; characters found at time of locking: ABCDEFGIJKLMNPTVWXZ245780]
572. Original; student; had a birthday party in which her mother was attacked ALICE B*LEN
[LOCKED; characters found at time of locking: ABCDEFGIJKLMNPTVWXZ245780]
573. Comics (gender swapped/different real name); cultural anthropology professor turned criminal; The Fury of Firestorm; could animate objects BLACK BI**N / MINA C*A*TAN
574. Original; asylum inmate; has drooling problem AB*A*AM
577. Original; housewife/restaurant assistant; supplied the burgers' secret sauce ***NDA BEEMAN
578. Original; pastor; lived in Odessa, Texas in 1925 P**ELL
579. Original; science centre owner; secretly worked for season main villain D**G MILLE*
580. Original; unrevealed, likely student if any; has alien for a pet ALANA (*PIKE'* **NE*)
581. Original; gangster; skipped town to avoid main character MA*C** *T*CK*EIME*
584. Comics (possibly); unrevealed; Arkham Asylum: A Serious House on Serious Earth; was rewarded money for hel[ping cast characters locate a car MAD D*G [LOCKED; characters found at time of locking: ABCDEFGIJKLMNPTVWXZ245780]
587. Original; high school music teacher; surname is a music term **A*P
588. Comics; Linguistics and Semiotics teacher, cultist; Worlds' Finest; left one cult but cultists tried to force her into another cult TAN*A *PEA**
589. Real person; physicist; kidnapped by cast character to help solve a specific problem; think Bohemian Rhapsody GALILE* [LOCKED; characters found at time of locking: ABCDEFGIJKLMNPTVWXZ245780]
592. Real person; phone operator, inventor, actress; film career drerailed by time-displaced woman *ED* LAMA**
593. Original; army officer; led soldiers in capturing cast characters MIK*AIL A*KADIN
594. Comics; slam harvester, dive instructor; Green Arrow: Year One; worked with cast character while trapped on an island TAIANA VENEDIKT*V [LOCKED; characters found at time of locking: ABCDEFGIJKLMNPTVWXZ245780]
595. Original; nation's president; killed during alien invasion T*AVELE* [LOCKED; both remaining letters the same characters found at time of locking: ABCDEFGIJKLMNPTVWXZ245780]
596. Slightly earlier (same episode) character this continuity; unrevealed; killed a cast character's father in a drunk driving accident B*ETT C*LLI** (EA*T*-2)
597. Original; secretary for major recurring character (season 1 of series) PA*LINA [LOCKED; characters found at time of locking: ABCDEFGIJKLMNPTVWXZ245780]
598. Original; judge; precided over trail of main character's mother MANDELBA*M [LOCKED; characters found at time of locking: ABCDEFGIJKLMNPTVWXZ245780]
599. Original; unrevealed; attended daughter's wedding but ended up making out with the would-be groom M*. *INCLAI*'*  M*T*E*
600. Comics but gender swapped; criminal; The Brave and the Bold; has mind control and telekinesis X*T**
603. Comics; unrevealed; Batman: Shadow of the Bat; born with mental illness and prone to attacking others AM*GDALA /  AA**N *ELZINGE*
604. Comics (gender swapped, so slightly different real name); criminal; The Flash; can induce vertigo T*P / ***A DILL*N
605. Original; cyberterrorist, now high school student; disowned by parents for being a lesbian PA*KE* T***E*
607. Comics; lab assistant; The Fury of Firestorm; cast characters unnerved by his resemblance to a super-villain  *EN** *EWITT (EA*T*-2)
608. Comics (likely different real name, Arrowverse version missing first word in code name); criminal, weapons dealer; The Flash; can create box-like force fields BL*CK / VANE**A JAN*EN
609. Original; scientist; alien with thorns on his forearms ***AN V**E
610. Comics; serial killer; The Fox and the Crow (real name), Green Arrow (code name); obsessed with main character's earliest vigilante persona *TA* CIT*  *LA*E* a.k.a.  INMATE ##22 /  *TANLE*  D*VE*
613. Comics; assassin, CEO; Young Justice; created an enormous destructive tidal wave *IP **A* /  ****ELL  **GE**
614. Original; newswoman; interviewed counsellor on anti-vigilantism bill JANE W**D*
616. Comics; vigilante; Batwoman, but inspired by character from Detective Comics; only seen in a photo KATE KANE (*A*T*-##) [For this one I'm locking the numbers as this one's now too easy to guess otherwise]
617. Comics; scientist; The Brave and the Bold; developed a device with the power to create a man-made earthquake B*I*N MA*K*V
618. Original; money launderer; worked for crimelord in flashbacks P**T* F*IEDKIN
623. Original, though name might be a nod to two real life people; business founder, investment magnate, philanthropist, socialite; held a fundraising gala where she spokie with cast characters looking for her son T*E*E*A ME*KEL
624. Original; unrevealed, likely student; cast character's first cousin once removed C**I*
625. Comics; nuclear truck driver; The Flash: Iron Heights; has power to emit dangerous levels of radiation FALL**T / NEIL B**MAN
626. Original; crime lord (code name refers to another occupation that he doesn't actually have); took over part of town after an earthquake T*E MA*** /  XAVIE* *EED
627. Original; police officer; killed by cast character in self-defense B**CK
628. Original; cultist; part of a coven wishing for old deities to be worshipped FEI*A [LOCKED; characters found at time of locking: ABCDEFGIJKLMNPTVWXZ245780]
631. Comics (indirectly); posed as chief of police; The Flash Secret Files and Origins; replaced main version of the character DAVID *ING* (MI****VE**E)
632. Original; accountant; attempt to retrieve money extorted from a mayor JA* *EIM*D*K
636. Comics (comics version's first name unrevealed); technology firm employee; The Flash; fired from organization and then killed for being whistleblower GENE ***KK
637. Original; arms dealer; came to town to sell a shipment of stolen weapons but was interrupted by cast character LE* M*ELLE*
639. Comics (indirectly); timeline protector; Hellblazer; mistakenly believed herself to be the real version A*T*A L*G*E (**B*T)
641. Original; unrevealed; father of cast character PA*L NAL [LOCKED; characters found at time of locking: ABCDEFGIJKLMNPTVWXZ245780]
642. Comics (name with slight capitalization difference from novel); scientist; Action Comics, name from The Adventures of Superman; similarly named character (missing one letter) from same creators from New Adventure Comics; father of major character J**-EL
643. Original; bus driver, criminal; stomach slashed by major villain KEI**A M***E
646. Original; unrevealed; gained powers in an experiment JA*PE* T**NE*
647. Original; criminal; right-hand man for recurring villain **ECK
648. Comics (prototype from magazine); vigilante; Action Comics  (prototype from Science Fiction: The Advance Guard of Future Civilization); villainous counterpart of a superhero **PE*MSN / KAL-EL (EA*T*- T*D22)
649. Real person; theatrical producer; oversaw major playwright's work P**L*P *EN*L**E
651. Original; councilman; ally of major villain K*LLEN*
653. Original; bartender; ex-girlfriend of main character *EAGAN [LOCKED; characters found at time of locking: ABCDEFGIJKLMNPTVWXZ245780]
655. Original, but resembles character based on comics; mobster; resembles character from Justice League of America; seen in artificial reality C*TTE* M**AN
656. Original; doctor; assigned to care for main character *AFAEL **D*IG*EZ
657. Original; police officer; provided superhero with intel AN**N
659. Original; research scientist; killed after procuring a map ET*AN **GE**
661. Comics; unrevealed if any; Martian Manhunter; betrayed his race during a civil war MALEFIC J'*NZZ [LOCKED; characters found at time of locking: ABCDEFGIJKLMNPTVWXZ245780]
662. Comics; drug dealer; Green Arrow and Black Canary; attempted to murder a police detective *EAN **N**
663. Original; TV anchorman and news reporter; reported on a major first episode story  ME**ITT DAVI*
664. Comics (different real surname); student; Flashpoint; had the power to harness electrical energy BLACK**T / FA**** GIB*A*
666. Original; named after real person but not a true counterpart; criminal; kidnapped major character's son J**N B**NE
667. Real person; astronaut; major villain impersonated him J**N *WIGE*T
668. Original; drug harvester, deckhand; harvested a specific drug on a recurring island VLAD VENEDIKT*V [LOCKED; characters found at time of locking: ABCDEFGIJKLMNPTVWXZ245780]
670. Original; anchorwoman; often reports on main character's activities *ANA *EWITT [LOCKED; both remaining letters the same; characters found at time of locking: ABCDEFGIJKLMNPTVWXZ245780]
671. Comics; criminal, orphanage head; All-American Comics; test subject for major villain C**** G*LD
674. Original; unrevealed; sibling of major villain **LIN DW*E*'* *I*TE*
676. Original; criminal; robbed blood banks for sustenance *ILA* W*ITE
677. Comics; astronomer, assassin; Crisis on Infinite Earths; may have replaced another character with the same code name due to the Arrowverse Crisis D*. LIG*T /  KIMI** ****I
678. Comics; vigilante, prison guard, police detective (latter was cover); Superman; attempted to execute escaped convicts MA*TE* JAILE* / "CA*L D*APE*"
679. Original but resembles character based on comics; waiter; resembles character from Justice League of America; existed in artificial reality PABL* [LOCKED; characters found at time of locking: ABCDEFGIJKLMNPTVWXZ245780]
681. Comics; newspaper intern turned police detective; Showcase; mistook main character for her husband I*I* WE*T-ALLEN (EA*T*-2)
682. Original; inmate; magical fugitive who loves to sing *G*E /  F*EDE*IC
683. Original; unrevealed; fan of major character's writing D**I*
684. Original; some sort of protector (can't be more specific without revealing too much fo the answer); protected cast character DAXAMITE PALACE G*A*D
687. Folklore; probably none; folklore of the Americas; fugitive from evil realm C**PACAB*A
688. Original; unrevealed; accused of being a witch JANE *AWT***NE
689. Original; music student graduate; attended University of Cincinnati VANITA *IP**N
690. Comics; princess; Action Comics, though elements of the character from Superman's Pal, Jimmy Olsen; major/cast villain N*XL*G*PTLNZ
691. Original, though possible nod to real person; military lieutenant turned special forces unit leader; attacked government organization for revenge J**NE*
694. Original; scientist; created super-soldiers with powers of specific villain METAD*CT**
696. Original; night club owner; main character slept with his fiancée MAX F*LLE*
697. Original; executive employee; committed acts of industrial espionage PETE* KANG [LOCKED; characters found at time of locking: ABCDEFGIJKLMNPTVWXZ245780]
701. Original; army member; served under cast character ANT*N*
702. Comics; scientist; The Fury of Firestorm; was seen as a potential superhero but became a villain T*K*MAK /  *EN** *EWITT
706. Original; singer; participated in reality TV competition *A*CÉ*
708. Original; football player running back; testified against murderous brother AP*LL* TE*L**
710. Original; scientist; wife of someone who was impersonated for a long time TE** M**GAN
712. Original; unrevealed; was seen as candidate for human trials DE**ICK *IMM*N*
713. Original; director; worked for major studio in 1937 A*N*LD C*LE**N
714. Original; police officer; killed in an ambush J*NE*
716. Comics (indirectly); science based employee to the extent applicable; Action Comics; counterpart of recurring character ALEX DANVE**' FAT*E* (*B*IDIAN PLATIN*M)
717. Original; scientist; ally of main character's mother JET**IAN IND**T*IE* *EMAT*L*GI*T (note: while not named in the show souce sources claim she's D*. T*VA; I'll accept either name)
718. Original; unrevealed; version of another character, attended a World's Fair EDIT* B*A*DMAN
719. Comics characters share code name but unclear if actual counterpart; extremist, would-be assassin; earliest known DC Comics use of name from Teen Titans; attempted to assassinate a US President *C**C*E*
722. Original; criminal; kidnapped people in a revenge attempt FA*ZAD *ADI*
723. Original; federal agent; killed by cultists DEM**
727. Comics; henchman; Action Comics; member of alien army who confronted another alien for making himself known to a government agency G**
728. Original; mobster, mechanic, repair shop owner; used as source of information by main character ALEXI LE*N*V [LOCKED; both remaining letters the same; characters found at time of locking: ABCDEFGIJKLMNPTVWXZ245780]
729. Similar to comics character with different code name and real name; doctor turned criminal; Wonder Woman;  augmented herself using stolen technology  C*BE*-W*MAN /  LA**A  WA**INGT*N

 

Unlimited guesses for the next 12 hours.

384. Danny de la Vega

442. Tegan Wickhem

455. Linda Park

472. Galahad

495. Carl

519. David Chin

524. Tammy

535. Mikhail