Ayano Aishi, or Yandere-chan, is the main protagonist of Yandere Simulator. You play as this character.
Yandere-chan is a Yandere, comitted to getting her Senpai to notice her, whether it be killing her rivals, or peacefully getting rid of them. Yandere-chan, up until meeting Taro Yamada, felt no emotion. She is aware of her problems and believes this is normal for her. She was able to feel lust for Taro and will stop at nothing to get him.
She can never be killed, but she can be injured, expelled, or heartbroken.