Sakamoto Kenichi

A cool and collected member of the Special Forces Unit Republic, who's able to keep his emotions in check despite sometimes feeling scared. [Spoiler]A former syndicate member, he had been drained of all hope and was willing to throw his life away.[/spoiler]
He is grateful to Natsume Daigo for recruiting him and is willing to put his life in his hands.

[Edited from the Wiki]