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After both Housen and Sakata Gintoki arrive, they begin to fight. Kamui and Seita then arrive at Hinowa's chamber as Kamui steps back to let Seita meet her himself. Kamui explains that he dislikes killing women, as they can give birth to children who can grow up to become strong one day. On the way, several Hyakka soldiers try to stop them, but each everyone got easily killed by Kamui in a brutal way. Kamui then tells him that he will help him meet his mother and show him the way to Hinowa's chamber. Kamui then searches for Seita, he then helps him by brutally killing the Hyakka soldiers. Kamui than leaves and tells Housen that he is not worth killing as he can rot and die in his Yoshiwara world. Abuto claims that it was a small price to pay for interrupting the fight. Kamui accidentally ended up killing Ungyou with his attack, as Abuto ended up losing his left arm to Housen. The fight is then interrupted by Ungyou and Abuto who stands in both their ways for attack. Kamui and Housen then clash, hoping to land a powerful strike. Housen gets the advantage at some point, but Kamui calmly turns the table and fights back, putting them on equal footing. Kamui and Housen then begin to fight, much to the dismay of Abuto and Ungyou's opposition. However, the one who got smashed into the ceiling was one of the female servants, as Kamui had switched places with her when Housen tried to hit him. An angered Housen tells Kamui to be quiet several times but when he refuses he smashed him into the ceiling. Kamui further angered Hosen by calling Yoshiwara a heaven he had made for himself, a prison for an old man to keep his cute little dolls. Kamui then displays a captured Seita and request a night with Hinowa, much to Hosen's animosity. Later on, Kamui meets with Housen as they speak about his past. Kamui reunited with his little sister Kagura but without hesitation, attacks her from behind and ending up destroying the pipe walls. To do so, he planned to kidnap Seita just as he and the Yorozuya were being shown a route out of Yoshiwara to use as a bargaining chip. He had arrived to meet his former master and wishing to meet the woman who made his master "weak". He first appears in Yoshiwara on the pipe walls together with Abuto and Ungyou where they confront Gintoki and the others to retrieve Seita.
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The reason behind this habit of his is on the pretense that all children have the potential to become exceptionally strong and forceful, to fight him one day, and that women can give birth to strong children. Also, by his own words, he doesn't kill children or women. He always pays his respects to the opponents he kills by sending them off with a smile. He tried to revive the abandoned tradition of a Yato clansmen killing their own parent to prove their strength, although he failed to kill his father, if not for his sister Kagura intervening he would have been killed. Because of this belief, he is pitiless and unsympathetic towards family or subordinates as signs of weakness are unacceptable. He firmly believes that the Yato are to remain on the battlefield and shows disapproval of Housen staying locked up in Yoshiwara. Kamui is always eager to fight with anyone who looks powerful. He almost always wears a cheerful smile on his face, even when he is killing, saying that everyone deserves a last moment of peace. He usually carries an umbrella with him to shield him from the sun, as well as to act as his weapon. He wears a traditional uniform used in Chinese martial arts, with a black and white top sporting elbow length sleeves, and gray pants that reaches the middle of his lower leg.
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It has been shown that women find him very attractive considering how much attention he attracted when he first arrived to Yoshiwara. Also like his sister, Kamui has blue eyes and vermillion colored hair, albeit his reaches his lower back and is always tied in a braid. Like all Yatos he has smooth fair skin, his body is also well developed, with strong and flexible toned muscles.
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