Kazuaki Ōji/Plot

Background
Ōji, along with Kurauchi and Tadaomi Kanda were part of the originial Yuba Squad with Fujimaru as their operator, at some point he and Kurauchi left Yuba Squad and later formed Ōji Squad.

Introduction Arc
Ōji Squad presumably takes part in the extermination of all rads in Mikado City.

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

Round Two
During the four-way rank war of the day division on February 5, Ōji Squad faces off against Azuma Squad, Katori Squad and Yuba Squad. The three Squads manage to force Haruaki Azuma to bail out by focusing their fire on him.

Round Three
On Saturday February 8, Ōji Squad fights in the day division of rank battles against Katori Squad and at least one other team, ranking fourth at the end of the match.

Round Four
Since Tamakoma Second fights Ninomiya Squad, Kageura Squad and Azuma Squad in the night division of rank wars on February 15, and since Katori Squad and all other possible opponents were in the middle tier of B-rank or lower, Ōji Squad must have fought in the day division against Ikoma Squad and Yuba Squad. After the scores from both divisions are tallied, Ōji Squad remains in fourth place with 22 points.

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

Round Five (Night)
After the results of the night division are tallied, Ōji Squad is overtaken by Tamakoma Second and pushed to fifth place.

Round Six
On Saturday February 22, Ōji Squad fights Tamakoma Second and Ikoma Squad in the day division of rank wars. In the meeting before the start of the match, Ōji announces his decision to select Cityscape A as the map, which befuddles Kashio at first, but after his captain's explanation he understands that he is looking to minimize risk. Ōji tells his teammates that their main target will be Osamu Mikumo, prompting Kashio to ask more questions. They agree not to go over their strategies to deal with Ikoma Squad due to how many times they have already fought them.

Round Seven
Since Tamakoma Second faces off against Kageura Squad, Azuma Squad, and Suzunari First in the day division of rank battles on March 1, it can be inferred that Ōji Squad competes against Ikoma Squad and Ninomiya Squad in the night division.

Round Eight
On March 5, Ōji Squad faces off against Azuma Squad and Kageura Squad in the day division of rank battles. Azuma Squad wins the battle, which took place in Exhibition Hall, with a final score of 4-3-3, putting Ōji Squad provisionally in fifth place.

Away Mission Test Arc
Oji captains squad 2 consisting of Oji, Hikari Nire, Shinnosuke Tsuji, Tatsuhito Ikoma and Yukari Obishima.