Yuuna Hayashi

A textbook sociopath, she lacks any form of empathy. As she isn't able to show emotions on her face, she is constantly pulling at her cheeks to make herself smile. As such, she is incapable of falling in love, and thus cannot be infected by "ID". This, a good combat ability, and absence of hesitation, makes her an excellent member of C.I.D.'s "Zero Squad".