Then we have the youngest individual to don the persona: Mattie Franklin, as portrayed by...
(I think it was Sin City
but something about Bledel has always made me favour her during fan-casts, especially for younger characters. She's not quite the ditsy punk -- a contradiction I know -- as Mattie is but being a talented actress you'd think it might be a challenging part for her, it'd certainly be interesting to see her in a role like that)
(a relatively unknown at this point, she's starting to pop up in a lot of places, is of the right age and get this -- appeared in Spider-Man 2
as one of the passengers on the Train. If Raimi-verse is canon, you'd think she picked up the mantle during Peter's absence in that movie in some bizarre expanded version of the film)
(the girl from Kick-Ass.
She appeared in Boston Public
and has some experience playing a character in a sprawling urban crime-drama, perfect for Mattie and of the right age as well)
(the girl from Malcolm in the Middle