Iceman was a hitman for the Port Mafia's Flags division and ranked second-in-command under Piano Man. He built a reputation as one of their most reliable killers, with a success rate that outpaced most ability users in combat roles—enough to earn the organization's confidence in him.
There's one notable failure on his record, though: he was tasked with assassinating Chūya back when Chūya led the Sheep, but the job didn't go through. Ironically, Chūya would later join the Flags as his colleague.
Content compiled by AnimeList.moe from publicly available sources.