Real Name: Jennifer Freeman
Non-powered (just her slingshot). Australian, teenaged, Aborigine.
Creator: Carter-Ethan Rankin
I envision her ending up in the US somehow and joining a New Warriors/Teen Titans type of team.
She's not overweight (or even "plus-sized") but, has a more realistic body size.
Slingshot is an open source character created specifically for use by anyone. Feel free to use it any way you wish; author citations are not necessary.