Kirisame seems to be a bit unhinged, eagerly anticipating the attack. Suien has to remind him not to kill too many people. He seems to be the most sadistic of the three, as he laughs while repeatedly stomping Sasuke.
Kirisame could use Water Release: Water Whip to make a rope out of water he could whip his opponents with, as well as restrain them.
He helped Suien attack Takigakure to take its Hero Water. He was the one who attacked Shizuku and Himatsu's mother outside Takigakure. Kirisame was defeated when Shibuki drank the Hero Water to fight back against him and his fellow attackers. His status after that is unknown.