Before she only had her eyes on Taro, Ayano was unable to feel anything. Yet, she acted like a normal high school girl and was hiding the empty feeling inside her. She does come from a long line of Yanderes that starts before time is recorded. Although she's emotionless, only near her senpai she does she feel like a normal person. Without him, she is free to eliminate whichever student that interferes between the relationship with Senpai and herself.