Tatsumi is a swordsman from a small village. He set out to the capital with two of his companions in hope of raising money for the village. He got separated from his friends and reaches the capital. Tatsumi was not aware of the type of place the capital really was. After a series of events centered around his naivety of the true nature of the capital he found himself being saved be Night Raid(Assassination Group) and later join them to rid the capital of its corrupt inhabitants. His Teigu is Incursio.