This is a backup form of marb, not very strong but spécialisés into healing (don't ask me how he became a girl)

I’m asking

So Uhhhhh everytime he turns into this form, it changes him to a girl, and how he obtained it you may ask.
Uhh he was forced to watch anime with his brother, then when he got into a fight he remembered a line from an anime and then boom he turned into this thing.

God

I know it's cringe and idk how to make actual good backstory

Their genderfluid