Izumi Shimomura

Tosaki's assistant and bodyguard.

She is an Ajin under the direct orders of Tosaki as his bodyguard, keeping her identity as an Ajin secret.

Her birth name was Yōko Tainaka (田井中 陽子). Being born in a poor family and an abusive step-father who wanted to sell her to the goverment, finding out her Ajin identity after killing her.