First attempt:
Unfortunately, June Jitsu does not exist in any official Marvel comic books, so there is no profile available in the style of the Official Handbook of the Marvel Universe.

Second attempt, after clarifying she's from a Marvel Hostess ad:
The June Jitsu is a fictional character featured in Marvel Hostess snack cake advertisements. Her abilities are enhanced by eating Twinkies, Cupcakes, and Fruit Pies.

Real Name: June Jitsu

Height: 5'5"

Weight: 120 lbs

Eyes: Brown

Hair: Black

Abilities: June Jitsu is a skilled martial artist with the ability to enhance her fighting skills and physical abilities by consuming Hostess snack cakes. The exact nature of this enhancement is unclear, but it allows her to perform impressive feats of strength and agility.

History: Little is known about the background of June Jitsu. She was featured in a series of Hostess snack cake advertisements in the late 1970s and early 1980s, in which she used her martial arts skills and Hostess snacks to defeat various villains and save the day.

Despite her brief stint as a Hostess spokesperson, June Jitsu has remained a popular and memorable character in the Marvel universe, and her appearances in the Hostess ads continue to be celebrated by fans of the era.