In Kamui's childhood, he lived in Tokyo, across the street from the Togakushi Jinja. Shortly after moving in, Kamui became fast friends with F?ma and Kotori Monou. Kamui and Kotori showed affection for each other at a very early age, which culminated in Kamui asking Kotori whether he could become her "bride". He has sworn to F?ma to protect her and never make her cry, and in exchange F?ma promised to protect him. In the TV series, this and several other childhood scenes from the manga were replaced by a scene in which young Kamui prevents Kotori from falling out of a tree at the risk of his own life. After this incident, F?ma, grateful to Kamui for saving his younger sister, pledged to Kamui that should he ever need help, F?ma would come to his aid.
