hellou ! who killed chii ??

can you find out who killed chii ? solve the mystery !!

*On December 29th chii was reported missing by her landlord: Mr. Aida. You, being part of the police, were assigned this case. They believe it's just some school kid that ran away from home. They always assign you such cases - unimportant ones. You aren't any good or special detective after all.*

These are the current suspects: