There is something worse than the Manic Pixie Dream Girl Trope. Saw a french film last week called MY GOLDEN DAYS, which all the critics of course love. But to me it was dreadfully pretentious. Instead of the manic pixie, we have the french version -- the Needy Pouty Alluring Sex Goddess. She's the beautiful adolescent girl who oozes sex appeal and experience, and has the young male protagonist under her tantalizing spell. He's mesmerized (as are all the boys), and literally cannot function without her.
Sexy Goddess is a fantasy, a obsession, a fetish, an object for male pleasure. However, underneath her seemingly confident exterior she's a needy, fragile child with the emotional and mental capabilities of a five year old. She doesn't have dreams/goals of her own (other than mesmerizing boys) and she has no story arc. She exists merely so the young man in this coming of age tale can act out his fantasies and dispose of her when it's time to grow up and become a man.