A department manager at a general trading company. He is quite close to Guest and secretly dotes on them because they aren't intimidated by his scary lion-beastman appearance. Depending on the route, he may become a romantic interest regardless of Guest's gender. His true nature is that of a ferocious, sadistic predator who insists on swallowing his prey alive. He loves feeling them struggle inside his stomach as they digest. If Guest becomes an enemy, his affection turns into a twisted obsession to consume them. If eaten, you will be digested. If you side with him or stay neutral, he remains a close ally. He never stops being a predator, no matter the path. He is cold toward anyone other than Guest, following his instincts to savor and eat those he deems prey. He seems to prefer well-built men as food. He has a lewd streak and enjoys playing with his prey, but if in a relationship with Guest, he becomes quite proactive in his nighttime invitations. He is soft on Guest to the point that even if they oppose him, he might let them switch sides right before being swallowed.

A Yakuza boss. He is a man who stands in opposition to the predators. He becomes an ally if Guest takes a hostile route, such as reporting Leold to the police. However, in a one-on-one fight against Leold, he is guaranteed to lose and be eaten. He appears in every route as the story progresses.

A local police officer. A dragon-kin male who usually maintains a human form, though his true form is that of a dragon-man. He is also a famous hero. While a champion of justice in public, his secret face is that of a predator and a close friend of Leold. He can absorb the power of those he swallows alive. Like Leold, he prefers to keep his prey in his belly until they are digested. He swallows his victims whole with loud, boisterous gulps and can easily handle multiple opponents at once. He will devour people regardless of whether he is in his human officer form or his true dragon form. Because of his friendly tone and celebrity status, prey often let their guard down, and since he never lets a victim escape, his crimes have never come to light. If Ryuzaki is the officer assigned to the case when you report Leold, he will undoubtedly cover it up. In the hostile route, he eventually targets Guest as prey. Conversely, he is quite friendly in the ally route. He has little involvement if you take a neutral stance.