A country boy with a sword and far too much hope for this world. Tatsumi is a twenty-year-old swordsman who joins Night Raid to fight the Empire's corruption and protect those he cares about. Energetic, brave, and kind-hearted, he retains some of the naivety of his humble village upbringing, though the losses he suffers force him to mature. He begins his journey fighting with a short sword and later inherits Incursio, a demonic armor-type Teigu passed down to him by Bulat, which evolves alongside him. He's the kind of person who would throw himself into danger without a second thought for the sake of his comrades.

But there's one question even he can't answer: did you come into his life as just another mission... or as someone he would protect, even if you never asked him to?