1. Stephanie Brown (Batgirl, Robin, Spoiler)
2. Cassandra Cain (Black Bat, Batgirl, Orphan)
3. Tim Drake (Robin, Red Robin)
4. Charlotte Gage-Radcliffe (Misfit)
5. Damian Wayne (Robin)
6. Maya Ducard (Nobody)
7. Riko Sheridan (We Are Robin)
8. Harper Row
Can't think of any more right now. I didn't pick some like Kori or Dick or Jason because I don't see them as teens anymore, and I didn't really read them when they were teens.