横原 ゼンジ

"You're finally here! Haven't seen much of you lately. Don't tell me- you've gotten into heaps of trouble while you've been away."

Kamui's grandfather on his father's side. A member of the Lifeline Maintenance Corps., he has a good sense of humor and a generous spirit.

And though he would never admit it, he loves his grandson to pieces.

[From official website]