The head of the Shinsengumi's inspectors (spies). Height: 169 cm, weight: 58 kg. Birthday: February 6. His defining traits are his overwhelming plainness and badminton (called "minton" in the series). When it comes to minton, he spends more time doing practice swings than actually playing. He also plays kabaddi. He sometimes neglects his duties to do practice swings, and each time he receives punishment from Hijikata as a matter of course. His unusual name "Sagaru" is not meant negatively; it carries the meaning of "step back and look at things calmly." In the Shinsengumi Crisis arc, he was fatally wounded by Kawakami Bansai and was hospitalized, but when he returned he was shockingly treated as dead. A sloppy funeral was held where Milo was offered and he was mourned as an afterthought along with Matsudaira's pet. He has many stakeout assignments, and each time he imposes a mysterious rule on himself of eating only anpan; when this continues for about a month, he goes mad from the stress and sleep deprivation. Incidentally, he doesn't really like Milo. He doesn't even like anpan. He also does undercover investigations, such as directly asking to join a factory suspected of being a terrorist organization and approaching Katsura. And he generally meets with terrible misfortune. At Hijikata's orders, he reluctantly sneaks into the Shimura household, infiltrating in ninja garb and, as expected, meeting with terrible misfortune. In derivative works there are depictions of him using kunai, but he has never used them in the original work. However, his abilities as a spy are high enough to slip past the crows controlled by Oboro, and in fact he serves as the head (top) of the inspectors, of whom at least a dozen or so are confirmed to exist. According to the author, his swordsmanship is about good enough to peel an apple without breaking the skin. In the anime, he often mowed down enemies with minton. Also, despite his baby face, at 32 he is the oldest of the main Shinsengumi members, but his everyday demeanor is actually surprisingly calm, and he can also (with exasperation) retort at and soothe his younger, runaway-prone superiors.

First person: ore
Second person: anta

Speech style: polite language