After joining Shinsengumi, he became a close retainer of Isami KONOD, Head of Shinsengumi, and was treated more respectfully than other ordinary members, but the arrogance that he inherited from his father gradually showed up and he started behaving rudely with Noboru ASHIYA etc. (therefore, Toshizo HIJIKATA and Soji OKITA always kept an eye on him).
入隊後は局長・近藤勇の側近となり、他の平隊士よりも丁重に扱われたが、次第に父譲りの傲慢さが露わになり、芦谷昇たちと共に粗暴を働くようになる（その為、土方歳三や沖田総司からは終始目を付けられていた）。