Houzuki, Yuuno

崩月夕乃

A girl who lived with Shinkurō in his youth and served as his sparring partner. Her gentle nature (though she exhibits yandere tendencies when other girls approach Shinkurō) conceals her strength as a fighter. Shinkurō acknowledges that she is far stronger than he is, despite being only one year older. Yūno is distressed that Shinkurō has not realized she was his first love. She still harbors feelings for him and constantly finds reasons to spend time together, such as preparing meals for him. However, her advances are often quite threatening (likely because Shinkurō is usually accompanied by another girl), causing him to simply let her have her way out of fear. Yūno resents Shinkurō’s decision to leave her household to live independently and worries he will turn into a hooligan. She has made it abundantly clear that she wants him to return to the Hōzuki household. Yūno has a five-year-old younger sister named Chizuru, who also has a crush on Shinkurō. Although the Hōzuki family is no longer involved in assassination, their grandfather expects Yūno and Chizuru to continue the family’s martial arts tradition.
In the anime, Yūno is much more assertive in her pursuit of Shinkurō and does not appear to display yandere tendencies.