Satoshi Mizukami is a B-rank Shooter and a member of Ikoma Unit.

Like most of his teammates, Mizukami is laid-back, although he tends to be more aware and mindful of the circumstances of a rank battle. Despite not being the captain, he is the de facto tactician of the unit, monitoring the state of the battle and assigning tasks to his teammates. On these and other occasions he may appear slightly cold, surly or querulous. However, it seems that the only shortcomings to get him even fleetingly upset are his own.

(Source: World Trigger Wiki)