Quirrell

Quirrell offically started off as Two_face_man on Twitter (and is still on there). His user then discovered Formspring and made a Quirrell account on there as well.

Quirrell is a Death-Eater from the first Harry Potter movie. He is great friends with all the other bad guys on Formspring. He finds Ash the most annoying kid ever, even more annoying than Harry Potter and wishes that one day Ash would die. He was once involved in a plot to kill Batman in Arkahm Asylum, but was stopped by Ash and loads of other people creating a wild choas at Arkham Asylum.

If Formspring would have been a series, Ian Hart would have definitly been re-casted as Quirrell.

Trivia

 * The guy behind the Quirrell account is AshKetchum1234's real life older Harry Potter obsessed brother. (and the two get on really well in real-life! Ash only acts like an idiot on Formspring. The same counts for Quirrell hating Ash.)
 * The person who plays Quirrell also plays Mafalda on Formspring.