Zoro and Hiyori are good friends and allies that met on Wano. Initially, Zoro was completely unaware who Hiyori was, both as an Oiran or as the daughter to the late Kozuki Oden. Nonetheless, he still helped her when she was being pursued by Kamazo and the two slowly bonded when she helped tend to the wounds he sustained. Once he found out she was Momonosuke's sister, and the daughter of the late Kozuki Oden, he vowed to rid her country of Kaido and, especially, Orochi. He also hopes to reunite her with her long lost brother, who has been travelling with him and the rest of his crew.Whilst Zoro is stoic and unmoving, Hiyori is sincere and kind. She repaid Zoro for saving her by tending to his wound and feeding him. She felt comfortable enough to reveal her own identity to him, which allowed Zoro to inform her that her brother is alive, filling her with great relief. Following this discovery, she realised that the Nine-Red Scabbards have returned to Wano, as was prophesied, and was ecstatic to hear that Zoro will be fighting alongside them to save Wano as she is amazed by his strength and power. Due to her life being at risk, she enlisted the help of Zoro as her personal protector and she slowly grew more comfortable with him. At one point, to help him stay warm, she cuddled up to him whilst they slept together.
