Nakai works alongside Yukino Chitose at the onsen inn Chitose manages, characterized by her black hair and brown eyes. She is aware of Chitose's ongoing relationship with Kenzo and advises Chitose to disclose it publicly. However, Nakai harbors a strong dislike for Kenzo, rendering her motivations questionable. Her counsel appears driven by personal interests rather than genuine concern for Chitose's well-being, influenced by her own undisclosed agenda regarding the situation.