Teen Franny

Teen Franny is Franny K. Stein's teenage self in an alternate future where Franny changed her middle name to Kaboom and never got over her peers laughing at her middle name.

Personality
Teen Franny is much more ruthless than her younger self and sees no problem with creating an army of elephant monsters to get back at everyone for laughing at her.

History
Teen Franny's only appearance is in The Fran That Time Forgot, where the present Franny changes the past by changing her middle name from Kissypie to Kaboom and decides to visit the future out of curiosity at what she'll be like when she is older.

To present Franny's shock, she finds her house dilapidated and her teenage self toiling away within all alone, seeing absolutely no sign of her parents, her little brother or Igor. Before Franny can fully process the ramifications of her time traveling, Teen Franny catches her and the two mad scientists get into a fight.

Teen Franny gloats to her past self that she can't beat her since she is older and more experienced, but Franny gets the idea to go back in time and get over her peers laughing at her middle name, an action which results in Teen Franny's future never occurring in the first place.