Grandmaster Otto
Otto wears a small chess knight at his throat, a keepsake from the years before his commission. He was a grandmaster then, admired for positions that appeared quiet until an opponent discovered how many choices had already narrowed.
Command taught him a harder lesson: people are not pieces, and a crew cannot be sacrificed without consequence merely because a plan looks elegant. Otto still names his volleys like moves, but he asks his officers to challenge an intention when they see a danger he has missed.
Gambit carries a table where the crew play during quiet watches. Otto enjoys losing to a thoughtful opponent almost as much as winning, provided the game produces something worth discussing. In battle, his calm can be unnerving. He is willing to give ground when doing so creates a better opportunity, and he has learned to distinguish a useful risk from a clever mistake.
Source: codex:captain_otto