Soushi Yukimi, a fifth-grade student at Oedo Elementary School, stands as one of the three primary descendants of the Shinsengumi lineage central to the series. He possesses a keen intellect, exceptional handsomeness, and notable popularity among female classmates. His flirtatious behavior is marked by a signature habit of spontaneously producing red roses for girls he finds attractive, a romantic tendency that frequently triggers comedic misfortunes or interpersonal complications.

As a descendant of historical Shinsengumi member Sensuke Yukimi, Soushi uncovers his heritage alongside classmates Isami Hanaoka and Toshi Tsukikage after discovering ancestral artifacts within the Hanaoka family basement. Among these artifacts are the Dragon Fangs, Soushi's spiritual weapons. These combine to form a luminous bow capable of firing energy arrows when activated, defining his precision-based ranged combat style which contrasts with his peers' close-combat techniques.

Soushi's personal journey intertwines with the overarching conflict against the Kurotengu organization. He actively participates in battles using his Luminotite-powered Dragon Fangs, contributing significantly to the group's efforts against the antagonists' schemes. His character navigates team dynamics, balancing a confident persona with moments of vulnerability during missions. While his romantic pursuits provide lighthearted subplots, they occasionally intersect with the central plot, particularly through interactions with female characters entangled in the Kurotengu conflict.

His ancestry deeply influences his role throughout the series, reinforcing themes of legacy and duty. This includes revelations about the Kurotengu's extraterrestrial origins and internal power struggles. Though his familial ties receive minimal exploration, his parents are named as Eisuke and Orie Yukimi. Soushi's character appears exclusively within the original television series narrative.