Tatsuhito Ikoma/Plot

Background
Ikoma hails from Kyōto. He was taught iaidō by his grandfather before being scouted by Border and relocating to Mikado City. At some point he was discovered to be compatible with Fūjin and created his signature technique as a counter to Takuma Yuba's fighting style.

Introduction Arc
Ikoma Unit presumably takes part in the extermination of all Rads in Mikado City.

Large-Scale Invasion Arc
Ikoma Unit is seemingly not deployed during the Second Large-Scale Invasion, and could therefore be among the B-rank units with missing members which Masafumi Shinoda prevents from fighting against Aftokrator's forces out of fear of capture.

Round Two
On February 5, Ikoma Unit faces off against Ninomiya Unit in the second round of rank battles. Ikoma is able to force Masataka Ninomiya to bail out by cutting him down with Ikoma Senkū from behind a wall. Since Azuma Unit, Katori Unit, Ōji Unit and Yuba Unit compete in a four-way match in the day division, it can be inferred that the three-way battle takes place in the night division and that Kageura Unit is the third participant.

Round Five (Night)
After the results of both the day and night divisions are tallied in round five, Ikoma Unit ranks third, with 27 points.

Round Six
Ikoma Unit is pitted against Ōji Unit and Tamakoma Second in Round 6. Jin warns Osamu that Ikoma is the best Senkū user in Border. Ikoma, along with the rest of his team, is very impressed by Tamakoma Second's feats in the rank battles. However, in spite of this, he and his team fool around by teasing Hosoi as well as talking about cute girls and the new cafeteria menu.

In the rank battle, he becomes concerned after Minamisawa is defeated by Kashio, and decides to challenge Ōji Unit himself. He is unable to hurt either Yūma or Ōji with his rapid Senkū attacks. After Kurauchi's Bail Out and Ōji Unit's subsequent retreat, he and Mizukami team up against Yūma.

Following the match, Ikoma Unit remains in third place with a point total of 34.

Round Seven
After the results of both the day and night divisions are tallied in round seven, Ikoma Unit ranks fourth.