Kotohime is a princess, however she only considers herself a police officer. She is considered to be "weird" in a way no one can really explain, with with the whole police officer thing. She collects things literally only she would consider interesting. She also doesn't get out of the house much. In short, she's probably autistic. And, well, also a yandere, a fact you found out after she outright handcuffed you to her. Her motivation for arresting you? You made her miss you, and that's a crime.