| Nagumo Kaoru|
|Eye Color||Light Brown|
|Hair Color||Dark Brown|
Nagumo Kaoru is introduced as a lovely young woman whom Chizuru and the Shinsengumi rescue from thugs in the street. It is later revealed that Kaoru is really a male and the twin brother of Chizuru.
The Shinsengumi members notice that Chizuru looks almost exactly like Kaoru, except for the fact that they are wearing different clothes. Kaoru looks exactly like Chizuru because they are twins.
In his disguise form, he takes on a feminine appearance, tricking those who do not know him, wearing make-up and accessories and a kimono. When Kaoru drops his disguise, he takes on a more western appearance, cutting his hair and wearing western clothing, having no trace of make-up or the sort.
Kaoru was born into the Yukimura Clan, a demon clan residing in the East of Japan. After humans had tried to destroy the Clan, he escaped with his life along with his twin sister, Chizuru. Being caught by the government as the few remaining survivors of the Yukimura Clan, Kodo was forced to give Kaoru to the Nagumo.
During this time, he had suffered emotionally and physically because he was not a female demon. Hearing that his sister was living a much better life than he did, he wished for his sister's despair.
It is also known that he was given the Yukimura Clan's heirloom, the katana, so it should be assumed that he was taught to use it from the Nagumo family who took him in.
Kaoru is first mentioned by Harada Sanosuke, who had seen him and mistook him for Chizuru. Chizuru first meets Kaoru as a woman on the streets by chance.
Later on, Harada is attacking a group of rebels, and Kaoru appears and kills some people. Harada is shocked, mistaking Kaoru for Chizuru. However, Chizuru later tells him that she was with the other Shinsengumi. When Okita Souji becomes extremely weak as a result of his tuberculosis, Kaoru appears and gives him a special ochimizu that would cure him. However, when he later attacks Kaoru, it's revealed that Kaoru is Chizuru's older twin brother, and that the two were separated at a very young age. Kaoru wishes to make Chizuru suffer, since he himself was treated very badly by the demon family that took him in, just because he wasn't female. He has a very vicious personality. However, when Kaoru tried to kill Chizuru, he failed, even admitting that he still loved her as a sister.
|Toshizo Hijikata | Chizuru Yukimura | Souji Okita | Hajime Saito | Heisuke Toudou | Sanosuke Harada | Isami Kondou | Keisuke Sannan | Shinpachi Nagakura | Genzaburou Inoue | Susumu Yamazaki | Kai Shimada | Itou Kashitarou|
|Kazama Chikage | Shiranui Kyo | Kyuujyu Amagiri | Senhime | Kimigiku | Nagumo Kaoru|
|Dr. Matsumoto | Enomoto Takeaki | Ootori Keisuke|
|Others / Game-Related|
|Serizawa Kamo | Ryunosuke Ibuki | Oume | Kosuzu | Niimi Nishiki | Hirama Jyuusuke | Sasaki Aijirou | Tonouchi Yoshio|
|Okada Izou | Kirishima Kozue | Takasugi Shinsaku | Katsura Kogorou | Glover | Yamagata Aritomo | Kusaka Genzui | Itou Hirobumi | Yoshida Shiouin | Takechi Hanpeita | Kirishima Sousuke | Kiyokawa Hachirou|