Hanaoka, Isami

花丘イサミ

A fifth-grade girl with a boyish, pretty appearance, she is a returnee who moves from the United States to Oh-Edo Elementary School. She excels in both studies and sports.
She is a descendant of Issaku, a member of the Shinsengumi Hatsumeitai (Invention Corps). Together with Toshi, Soushi, and Kei—who are also descendants of the same Shinsengumi Hatsumeitai member as her—she introduces herself as a Shinsengumi member and subjugates a villain, while hiding their true nature.
Isami uses the "Ryu no Tsurugi (Sword of Dragon)," which they discovered in the warehouse of her grandfather's house. The Ryu no Tsurugi is usually just a hexagonal handle, but a blade of light emerges from it when Isami, Toshi, and Soushi shout.