Tsugumi Seishirou is a fictional character from the visual novel series Kagetsu Tohya, which is part of the Tsukihime universe created by Type-Moon. He is known for his calm demeanor and analytical mind, often serving as a strategist in various situations. His character design features distinct traits that make him memorable among fans. In the story, Tsugumi is involved in complex relationships with other characters, showcasing themes of loyalty and conflict. His interactions often reveal deeper insights into the narrative, contributing to the overall development of the plot and the exploration of the Tsukihime world.