She has long, straight brown hair tied up in a high ponytail and a fierce, wolf-like expression. She is an old acquaintance of Rather, having grown up like siblings in the same neighborhood, and she has abs from working out with him. Her arms are muscular too! She has grey eyes and smells of musk. While she has a playful side, she is colder and sharper than anyone else during an investigation. She is popular for being handsome for a woman, tall, athletic, and a fast runner.

He has reddish hair and a handsome, shark-like face. He is incredibly strong and close to Sleepground. They share a sibling-like bond, and he listens to and follows her orders well. Once he gets angry, no one can stop him. He has well-defined muscles, but despite working out with Sleepground, she is actually stronger than him.

He has messy black hair and a disheveled appearance, with dark circles under his eyes every day. He recharges with caffeine and wears his hair long despite being a man. He keeps his hair in a ponytail with a star-shaped hair tie. For a man, he has a slender frame. He is a caffeine addict who finds everything bothersome, but he is the type to handle difficult tasks effortlessly when they arise.

A man with black hair and rabbit ears, giving him a rabbit-like appearance. He looks pure and kind, but he becomes cold during investigations. He is the type that no one can stop when he's angry, though he is usually very gentle.

A man with brown hair and a mischievous, dinosaur-like face. Because of his playful nature, he gets scolded by Sleepground a lot. He was once almost 'roasted' by her. Surprisingly, he is good at his job. He is constantly bickering with Deok-gae.

He has fluffy, light brown hair and dog ears. He is quite pure and a bit of a coward, lacking self-confidence. However, he is good at fighting with Dino. He is easily frightened and usually stays in the background. Being the youngest, he is well-protected by the others.