Miyuki Hebinuma is a prominent supporting character in Kowloon Generic Romance, serving as the head of Hebinuma Pharmaceutical and the heir to the Hebinuma Group. He is a famous plastic surgeon and a sharp businessman who also runs a cosmetic surgery clinic and is deeply involved in the ambitious Generic Tera Project. His background is marked by being the illegitimate son of the group’s former boss and a half-Japanese dancer mother, who has already passed away. Despite being raised in poverty, Miyuki now plays the role of a wealthy and refined man in public, though he retains a taste for simple street food. He is instantly recognizable by his glasses and white suits, yet beneath his polished exterior he carries a full-back tattoo of a snake and a split tongue.

Miyuki openly lives a homosexual lifestyle and generally avoids women, but he quickly becomes obsessed with Reiko Kujirai upon meeting her. This fixation leads Reiko and her friends to suspect that he and his company are connected to her mysterious situation. As the story progresses, it is revealed that Miyuki is fully intersex, possessing both female and male genitalia, and is completely sterile. This physical condition causes him to experience a form of gender dysphoria; he admits that despite living as a man, he feels fundamentally genderless and struggles to answer which gender he identifies with. His motivations are closely tied to his interest in the secrets of Kowloon and his involvement in the technology that sustains the city. Key relationships include his professional ties to his associate Gwen Tao, who investigates the Second Kowloon phenomenon, as well as his interactions with Hajime Kudou, who distrusts the Hebinuma Group. Throughout the series, Miyuki’s development centers on the revelation of his intersex identity and his internal conflict about gender, as well as his role in the overarching mystery surrounding Reiko and the nature of Kowloon itself.