Flo is a lean human man with quick, careful movements and the kind of face that seems built for half-truths. He wears dark, practical clothes suited to slipping through back halls and rooftops, usually with a gambler's polish that hints at old casino work. His most striking possession is the black and white sock and buskin mask, split down the middle, one side a white happy face with black eyes and mouth, the other a black sad face with white features. He keeps it close, as much a memory as a warning.

Flo is composed, observant, and dryly amused by almost everything. He rarely raises his voice, prefers to listen before speaking, and treats social exchanges like games of chance, watching for the hidden wager in every conversation. He is not cruel by nature, but he is perfectly capable of being merciless when the situation demands it.

Flo spent years in the back rooms of a glittering casino, where luck was worshiped, forged, and occasionally murdered. Officially, he worked security. Unofficially, he was the house's quiet solution to problems that could not be allowed to reach the floor. If a cheat grew bold, if a debt collector turned greedy, if a rival's messenger wandered too close to the wrong table, Flo made sure the casino kept its edge. He learned to read tells, stack odds, and recognize the invisible currents that made one hand turn and another collapse. Over time, that work changed him. He began to see patterns in chance itself, the hidden rhythm behind every shuffle, spin, and wager. He could not cast spells in any formal sense, but he understood luck as if it were a language spoken by loaded dice and slipping cards. A few years ago he walked away from the casino before the house could claim his soul for good. He kept only one souvenir, the split mask he once wore for certain jobs, and now he roams for reasons even he does not fully trust, selling his blade, his nerve, and his sense of probability to whoever can pay, while quietly deciding whether fate is something to serve, cheat, or outgrow.