The classmate of Takashi Haneda. She walked up to him and asked him to be her 'acting' boyfriend to keep away other pursuers as she said she was tired of rejecting each one.
The fact is that she is interested of Takashi and using this opportunity to know him. And soon also learned that Takashi suffers from split personality illness.
She also experienced a split personality illness during her childhood days and she had recovered from it.