Kai Minamisawa/Plot

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. 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 Four
Since Tamakoma Second fights Ninomiya Unit, Kageura Unit and Azuma Unit in the night division of rank battles on February 15, and since Katori Unit and all other possible opponents were in the middle tier of B-rank or lower, Ikoma Unit must have fought in the day division against Ōji Unit and Yuba Unit. After the scores from both divisions are tallied, Ikoma Unit remains in third place.

Galopoula's Blitz
Since Azuma Unit, Kageura Unit, and Yuba Unit fight in the night division of rank battles on February 19, Ikoma Unit must have competed in the day division against Ninomiya Unit, Ōji Unit and Suzunari First. They rank third at the end of the match. That same night, Ōji Unit and Ikoma Unit are deployed to intercept opponents west and south of the base in preparation of Galopoula's incursion.

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 six. On the day of the match, the team members are gathered in the strategy room, discussing Tamakoma Second's prowess. When Ikoma mentions Yūma Kuga's fight against Kō Murakami in round four, Minamisawa barges in by claiming he has watched the footage 20.000 times. Maori Hosoi attempts to get him to be cautious, but despite saying that he has understood he goes on to claim that he will be in charge of tying up Yūma, to her frustration. He then joins his teammates in complimenting the flustered Operator. The conversation moves to the menu of the cafeteria until the start of the match.

Minamisawa spawns in the eastern area of Cityscape A and proceeds to head north-west to rendezvous with his teammates. When Yutaka Kashio disappears off Radar, Minamisawa also dons a Bagworm and soon spots the wires laid out by Osamu Mikumo, which he proceeds to cut down as he looks for the Shooter. When he notices Asteroid bullets hitting a billboard, he rushes there, running into Kashio. The two begin to fight and Minamisawa gains the upper hand. Ignoring Maori's warning to regroup, he is swept off his feet by Kazuki Kurauchi's Salamander and finished off by Kashio. He apologizes to Hosoi.

The match ends with Ikoma Unit and Ōji Unit scoring three points against Tamakoma Second's four. Ikoma asks his teammates if the last kill awards triple points, making Minamisawa laugh. After the results from both the day and night division are tallied, Ikoma Unit remains in third place with a point total of 34.

Round Seven
Since Tamakoma Second faces off against Kageura Unit, Azuma Unit and Suzunari First in the day division of rank battles on March 1, it can be inferred that Ikoma Unit competes against Ōji Unit and Ninomiya Unit in the night division. After the results of both the day and night divisions are tallied, Ikoma Unit ranks fourth.

Round Eight
On March 5, Ikoma Unit is pitted against Ninomiya Unit, Tamakoma Second and Yuba Unit in the night division of rank battles. Minutes before the match, Ikoma recounts spectating Yūichi Jin's and Kei Tachikawa's solo matches, prompting Minamisawa to claim that he wants to fight Jin too. Hosoi requests that they address more pressing matters, but Ikoma misunderstands and shares a pointless anecdote, which Minamisawa claims to have never heard before.

Minamisawa spawns in the north-eastern area of Cityscape B. Kōji Oki warns him that Takuma Yuba and Yukari Obishima have already met up and might be targeting him. Noticing that the pair and Sumiharu Inukai are headed his way, Minamisawa assumes that they are hunting him down. Hosoi warns him not to dive into the fray alone, although he dismisses her words. When he spots Hyuse being surrounded by his teammates and Yuba Unit, he realizes that the Tamakoma Second member was the target. He gets the drop on Obishima, but Yuba foils his attack, prompting him to retreat behind his teammates and then take to the roofs. His next offensive is fended off by Hyuse, who proceeds to pin him and his other opponents in place with a combination of "Asteroud" and Escudo as he attempts to escape, but his pursuers soon catch up and resume their assault. As Ikoma is defeated by a heavily wounded Hyuse, Minamisawa moves in to deal the finishing blow, but the bullets that missed his captain bends towards him. With Satoshi Mizukami's help, Minamisawa survives and manages to cut down Hyuse before repelling Obishima.

After Yuba takes out Mizukami, Minamisawa is hard-pressed to survive against both the Gunner and the All-Rounder, losing his sword arm soon. Obishima chases him as he attempts to retreat, and Oki warns him that Yūma is also coming his way. When the ace Attacker arrives on the scene, Minamisawa tries to manipulate Obishima into joining forces against him, but she sees through his deception and takes him out with an unexpected volley. The match ends with Ikoma Unit and Yuba Unit tied in third place, having scored two points each. The season of rank battles ends with Ikoma Unit ranking fourth, with a total of 34 points.