Age: 14 years Birthday: 7/31 Height: 168 cm Weight: 54 kg Shoe size: 26 cm Likes: Rabbit meat, reading (modern literature) Dislikes: Rhetorical flourishes, historians Specialty: Using the five elements, Japanese dancing Fighting Style: Fukushima shinobi-style taught in the Banten area
Rokujo's 14-year-old classmate who studies nindo under Kumohira. Though he normally has an energetic attitude when around others, he is serious and relentless when it comes to his ninja duties, and is apparently fascinated with death. It is later revealed that his love of death is a result of his own inability to die. His immortality is attributed to the holder of the Shinrabansho during the Edo Period, who was a medical practitioner, experimenting with placing the wisdom of the Shinrabansho into animals, since humans usually died. There were only two survivors of the experiments, both of whom gained immortality as a result. Koichi's ultimate goal is to find a way to die, as well as ensure that "monsters [like himself] are never created again." He was born on July 31.
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