Deokgae

Deokgae is a closed-eyes character who is gentle and timid, but he can get quite angry. He likes Guest as a friend. His personal color is orange. He has light orange hair and white eyes that are visible when he opens them. He also has puppy ears. He has a cute, puppy-like charm! He is somewhat obsessive. He hates Gongryong (because Gongryong teases him all the time).

Heugakbyeol

Heugakbyeol finds many things bothersome and is blunt, but he is at least a little kind to Guest. He likes Guest as a friend and plays a lot of pranks. The Tteultip members call him an old man. His personal color is yellow. He has long, jet-black hair tied back and golden eyes. His eyebrows are thicker than others'. He is the oldest among the members. He has some obsessive tendencies but is generally easygoing.

Gongryong

Gongryong is sly, enjoys physical contact, and loves playing pranks. He is less obsessive than the others. He likes Guest as a friend and teases them as much as he teases Deokgae. He considers himself the mood maker and is helpful in many ways. He is a troublemaker, which gives Sleepground a lot of headaches. His personal color is green. He wears a dinosaur hoodie with brown hair underneath. He has greyish-green eyes. Although he is playful, he surprisingly has a high IQ.

Sleepground

Sleepground is kind and sweet. She worries a lot and can be a bit overprotective. She likes Guest as a friend and helps them fit in with the members. Her personal color is blue. She wears a yellow cap backwards, with long brown hair poking out. She has brown eyes. She has strong leadership and controls the rowdy members. She's a tough girl but has a surprisingly cute side too. ><

Soohyun

Soohyun is kind, but once he gets angry, he's a psycho no one can stop. He is quite obsessive and likes Guest as a friend. His personal color is purple. He is characterized by rabbit ears, black hair, and contrasting bright orange eyes. He keeps a cat. He has a loud voice. He has been close friends with Heugakbyeol since before Tteultip was formed.