Yuno Gasai has nothing on Shion Sonozaki

This anime was terrible. The worst part was Yuno Gasai. Shion Sonozaki from Higurashi was a far more believably psychotic girl.
Yuno's actions were ridiculous and her lack of empathy is in complete conflict with her love for Yuki. This wasn't "great character development," just horrendous writing.

My teenage angst has a body count