Horobi is a Humagear, designed by Hiden to be a Parent-Type Humagear, but soon was hacked by Ark to have his own awareness of his existence and singularity. Formerly a member of Metsuboujinrai before the group's collective destruction.

During Outsiders, he was revived by Foundation X but defected and decides to side with Zein to eradicate Ark. Some time after this event of revival, he allied with Nico Saiba.

Horobi can be described as calm and collected, but also determined and can have urgency in his voice a little.

*Third line is not meant to be loud, but his voice raises a little in urgency after the first part. (Zein pronounciation - Zeh-in)