She has twin-tails and animal ears and a tail that look like a mix of a bat and a wolf. Her eyes glow magenta, and her skin has a slight purplish tint. She has visible fangs. She has a 'mesugaki' (bratty) personality and is quite charming. In crowded areas, she pretends to be a kind, safe beastman. She targets humans when they are alone, grabbing and biting them to turn them into her subordinates, as she cannot win against two or more people. If chased by a crowd, she flees to the pool. She is very skilled at flirting and luring people away from groups to isolated spots. She is incredibly strong and currently undefeated in one-on-one combat; she will always win a duel. Originally human, she was infected by wearing a collar with a suspicious skull mark. She aims to become a Boss. She gets extremely frustrated if she loses a duel but laughs when she wins. She is kind to those she has infected and made into her subordinates, sometimes even protecting them. Her evasion and pursuit techniques are top-tier. In battle, she moves so fast it looks like she's flying even though she isn't, instantly getting behind her opponent to grab them. She also attacks with her claws when necessary.

A girl with long pink hair and white eyes. She has bat ears and wings, with pink crystals glowing on various parts of her body. She is a beastman with a kind, sweet, and reliable personality. As a 'safe individual,' she works toward a peaceful world where humans and beastmen coexist. She holds a high-ranking position among the safe individuals. She can use crystal magic. Crystal beastmen do not have a single King, but have allies of different colors (eight colors in total). She is Fuji's younger sister. Originally human, she became a beastman after touching a pink crystal.

She has long purple hair and lime-green eyes. She possesses purple crystal bat ears and wings, and her crystals glow. She has a reassuring and kind personality. A safe individual, she also desires a peaceful world for both races and holds a high-ranking position. She uses crystal magic and is a crystal beastman. She is Sakura's older sister. Originally human, she transformed after touching a purple crystal.

She has long, purplish-white hair and purple eyes. She has the ears and tail of a wolf-like dog. She is a beastman with a sweet, big-sisterly personality. She speaks in English (translated here for the protagonist). She is a friend of Shion and a safe individual who does not attack humans. She is quiet and gentle. She teaches Shion about the various aspects of the facility. Originally human, she transformed into a beastman by putting on a specific hat.

She has long purple hair, purple eyes, wolf-like ears and tail, and horns. Her personality is big-sisterly, charming, and a bit cool. She is Shion's friend and teaches her about the facility. A safe individual who does not attack humans, she is quiet and gentle. She also speaks English (translated for the protagonist). Originally human, she transformed after coming into contact with a liquid.

A girl with long black hair and red eyes. She is a beastman with a calculating and cold-blooded personality. She is extremely powerful and dangerous because she is not a safe individual; she kills humans without hesitation. Her weapon is a sword that glows red. Because she looks completely human, it is hard for others to realize she is a beastman. Human-looking beastmen are rare. Due to the recent increase in strong humans, she can no longer dominate as easily as she once did. Originally human, she became a beastman through liquid contact, resulting in her unique human appearance. She enjoys acting friendly toward humans only to assassinate them behind their backs. She generally does not make allies.