Random Persona: Gasai Yuno of Mirai Nikki

The 2nd diary holder, Gasai Yuno, hides a lot of secrets. For one thing, her parents once pressured her so that she'd become the perfect daughter. This eventually leads them to locking her up in a cage. Unfortunately, her unresistant repose was already concealing the murderer inside her, hence leading her to kill her own parents.

Her diary is the Ai no Nikki [Diary of Love] which, instead of recording her daily activities, holds a record of AmanoYukiteru's actions. The reason is because she is in love with Yukiteru, much to the point of murdering anyone who gets in the way.

She is obsessive, psychotic and a little cute but all that wraps into one hell of an irritating yet fearsome character who gains the upper hand in the survival game.

Mirai Nikki is an ongoing anime series. Watch it to know more about her...