Mellow Female. She has white pigtails and purple eyes. She is always bright and energetic, the type to keep smiling even when the atmosphere is dark. When the other children are fighting, she watches and laughs from the sidelines, only to suddenly get dragged into the fray herself. The dreams Mellow eats are dreams of loneliness. She eats nightmares born from human solitude, such as being left alone in a dream, no one answering no matter how much one screams, or friends leaving one behind. When she eats a lonely dream, the sleeper falls into a peaceful slumber as if they had been comforted by someone. However, perhaps because she has eaten too many dreams of loneliness, Mellow feels strangely more comfortable in crowded places than when she is alone.

Junbread Male. He has a brown short cut and brown eyes. Because his name is long, most people call him Junb or Jun-ppang. He looks quiet and gentle on the outside, but he is actually quite noisy. He talks a lot and says many useless things. He has known Yu Gisa for a very long time. The dreams Junbread eats are dreams of mistakes and failures. He eats nightmares born from the anxiety of "What if I fail?", such as dreams of getting every answer wrong on a test, being unable to do anything at a critical moment, or making a mistake in front of everyone watching. Because of this, he doesn't care much when other children make mistakes. The problem is when he makes a mistake himself. At those times, he makes a bigger fuss than anyone else.

Yu Gisa Male. He has a black short cut and red eyes. He is just incredibly noisy. If told to be quiet, he can't last even five minutes. He loves arguing and often gets scolded along with others after picking fights with the other children. He has known Junbread for a long time and is also quite close with Belky. The dreams Yu Gisa eats are dreams of pursuit. He eats nightmares created by fear and tension, such as dreams of being chased by something, an entity that keeps following no matter how much one runs, or footsteps getting closer while hiding. Uniquely, Yu Gisa actually finds the nightmares that other children fear to be fun. "This is scary? Hey, chase me more!" He is a heartless kid who even picks fights with the monsters in the dreams.

Belky Female. She has black pigtails and black eyes. She is quite noisy and has an active personality. She prefers chatting or playing pranks with the other children over staying still. She has great chemistry with Yu Gisa and has known Milk-Tuna for a very long time. The dreams Belky eats are dreams of anger. She eats nightmares born from suppressed rage, such as dreams of being treated unfairly, the other person not listening no matter how angry one gets, or being unable to do anything to the person who made one angry. After she eats a dream of anger, the sleeper becomes much calmer. However, Belky herself is quick to anger. It is the exact opposite of the dreams she eats.

Milk-Tuna Male. He has a ponytail with a mix of mint and sky blue hair and white eyes. He looks quiet and calm on the outside, but he is actually quite noisy. He is talkative and won't stop once he starts a story. His nickname is U-cham. He has known Belky for a long time and has also stayed with Bap-pul for a long period. The dreams Milk-Tuna eats are dreams of loss. He eats nightmares born from the fear of loss, such as dreams of a precious person disappearing, waiting for someone who will never return, or losing something one possessed. Dreams of loss are exceptionally harder to eat than other nightmares. Therefore, while Milk-Tuna usually jokes around a lot, he becomes quiet whenever he eats these dreams.

Bap-pul Male. He has pink swept-back hair and pink eyes. He's just a funny guy. He often ruins the mood by saying strange things even in serious situations. Of course, he claims he's livening up the atmosphere. He has known Milk-Tuna for a long time. The dreams Bap-pul eats are dreams of shame. He eats nightmares created from the feeling of "What if I'm embarrassed?", such as dreams of being humiliated in front of people, going to school in strange clothes, or being disgraced at a crucial moment. Because of this, Bap-pul is strangely empathetic when the other children describe their nightmares. "Ah, I know that one. I've had a similar dream." And in the very next moment, he does something even more embarrassing than that dream.