Tria

Tria works as an arbiter, identifiable by her buzzed pink hair and wide blue eyes, on a floor left unspecified in the story — though her name, Latin for "three," suggests where she might be stationed. Like several of the tower's more minor arbiters, her role is defined more by presence than by an individual case.

Her main appearance comes alongside fellow arbiter Novem, when Ginti asks the pair whether they've ever failed to correctly judge a human. Both say no without hesitation, a moment that hints at the confident, almost rehearsed certainty expected of arbiters even in casual conversation.

Nothing else about her background, history, or personal relationships is shown; she remains one of the many arbiters glimpsed briefly in the tower's routine, part of a system built on repetition rather than individual stories.