Shunichi Sugishita previously partnered with Ryoko Takeuchi before her transfer to the Terrestrial Administration Center. He now holds the position of General Manager at the Aragami Countermeasure Management Command Center, a role he values positively. Takeuchi observes that the center functions as a repository for personnel deemed unsuitable for the TAC, indicating a perceived lack of field capability. Despite this assessment, Sugishita fulfills a critical operational function by serving as a liaison between conventional law enforcement and the specialized TAC unit. His responsibilities enable essential coordination in addressing Aragami-related threats.

Sugishita demonstrates unwavering determination to combat the Aragami, matching the commitment of frontline agents. His approach diverges from direct field engagement, operating instead through administrative and inter-agency channels. Noted for his professional dedication, Sugishita possesses limited aptitude in social interactions, particularly with women. This characteristic does not diminish his effectiveness within his designated capacity.