Kuniharu Kakizaki/Plot

Background
Kakizaki joined Border during its debut 4 years prior to Yūma Kuga's enlistment. He was at a press conference with his teammate at the time, Arashiyama, regarding Border's recruitment of new members. When asked by a journalist who opposed Border whether he would protect his family or fellow citizens if they could choose only one, Kakizaki was unable to anser, while Arashiyama did not hesitate to pick his family. His ability to sway the crowd caused Netsuki to choose Arashiyama Unit as the PR unit, which prompted Kakizaki to leave it out of insecurity. Ayatsuji immediately introduced him to Madoka Ui so he could form his own unit, and he received applications from two prodigies, Kotarō Tomoe and Fumika Teruya.

Large-Scale Invasion Arc
Along with the rest of his unit, Kakizaki joins the fight against Lamvanein, initially failing to accept that the opponent could be as powerful as the reports suggested. When the Neighbor forces his enemies to hide, Kakizaki apologizes to the C-Ranks for being unable to help them. At Azuma's command, the members of Kakizaki unit start firing at Lamvanein to pressure him into revealing openings. Following the Neighbor's defeat, Kakizaki Unit is deployed to defend the southern area of the city. To the best of Tokieda's knowledge, it was the only B-Rank unit to survive Aftokrator's invasion without a single bail out.

B-Rank Rank Battles Arc
Kakizaki comes across a lost Yūma and guides him to the place where the Rank Battles are held. When Yūma fails to recognize him, he reveals that his team is one of Tamakoma Second's upcoming opponents. He displays visible shock when Kako asks Yūma to join her unit, and again when he nonchalantly refuses. When Kako explains to Yūma that her goal is to recruit talented agents with the initial "K", he akss her if she has tried to recruit Kakizaki. She responds that he is not their type, with Kakizaki replying that she does not have to be considerate. He grows uncomfortable when Kako pretends to want to recruit Yūma by force and teh two mock-fight in front of everyone until Kageura arrives, only for him to start pulling at Yūma too.