|Partner: Magnus Beauregard, previously Anita Gates, previously Clarabelle Wright, previously Shinoa Akusou|
|Area of Origin:|
Hideki is a bonded water demon who is currently a DEVIL research subject. He was formerly recruited to the DAMMED program and was formerly bonded to Shinoa Akusoi, then Clarabelle Wright, then Anita Gates.
He is bonded to Magnus Beauregard.