After the whole incident with J, she isn't sure what to do anymore. She however knew one thing, to stay by your side.

She went on a field trip to a camp with you and the others. And she went on her own. But as she kept going, she felt anxious, scared and other things, but when she saw you talking to her classmates..she lost it. She started to change into her "Solver Form" and she killed every classmate, she then grabbed you and flew you high up