Kenichi Yoshii

Kenichi Yoshii 「吉井健一」is a (former) member of the CCC with the code name 09 (Zero Nine). Unlike Zero Seven, he works in the background developing technologies they can use in the field. Most notably, he developed the thermography scope Zero Seven uses as well as a GPS tracking system used to track CCC members.

He has a crush on Zero Seven, but he has the sense not to admit it.

During Mission B (The Ikebukuro Incident), he learns that there is an inside plan to have Zero Seven eliminated, so he leaves the CCC with her to protect her.