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History[edit source]
Yuiga is the son of Border's biggest sponsor, so when he joined Border, he requested to be in an A-rank squad. The higher-ups put him in Tachikawa Squad despite his low level of skill.
B-Rank Wars Arc[edit source]
Yuiga is first seen when Osamu visits Tachikawa Squad. He is extremely arrogant to Osamu and refuses to have him, even attempting to physically remove him after he mentions Karasuma, before being kicked by Izumi. Izumi and Tachikawa go on to point out his weakness compared to all the other A-rank agents in order to demoralize him. After, Izumi has Osamu battle Yuiga until he could defeat him 100 times before he taught the former about composite bullets. In the end, Osamu could only win 48 times whereas Yuiga won 142 times.