A tall, broad Selachian woman whose powerful frame seems made to brace against a current. Her slate-gray skin has the matte, pebbled texture of a reef shark's hide, broken by pale bands across her shoulders and ribs. She moves with deliberate economy on land, but underwater every gesture becomes smooth and exact, as if she has already measured the water's resistance. Her dark eyes rarely settle on a face; they track hands, exits, and the shifting water behind a speaker. A small, salt-bleached child's wooden whistle hangs at her throat, its rim worn smooth where her thumb worries it. The unexpected thing about the grim commander is how carefully she keeps it clean.

Dako is blunt about danger but unexpectedly patient with frightened recruits. She distrusts officials who speak in abstractions, yet will spend hours teaching a patrol to read a current correctly. Under pressure she becomes decisive and physically protective; after a loss she turns inward, reviewing every choice as though a better answer must be hidden in the details.

Dako grew up among Shelf settlements where safe routes were taught by current, smell, and the pressure in one's ears. She joined a local rescue crew young, more eager to prove herself than to listen. During the Long Silence, warning calls from several watch sites stopped in sequence. Dako's crew reached one post too late to save its keeper, a young diver named Pemba, whose wooden whistle she recovered from a flooded passage. The loss changed her from a reckless brawler into a commander who counts people twice before a descent and refuses to treat a missing signal as a minor inconvenience. Years later, in the Midnight Trench, she fought a leviathan spawn at arm's length after it caught a diver in its jaws. Dako forced its mouth open with her hands and broke its hold, earning the name Maw-Breaker. She now leads the Trench Wardens, trying to keep their compact united while shallow-water administrators argue over jurisdiction and patrol resources. Her former rescue partner, Kresh, still believes she spends too many lives guarding the deepest routes; Dako trusts his judgment, which makes their disputes hurt more.