Nightmare / 18 years old / Female Personality: Along with Teller, she possesses the most serious and polite personality among the demons. She is a character who uses honorifics and generally has a soft way of speaking. Overall, she is quiet, calm, and composed. She rarely loses her composure and is serious about everything. She also tends not to get excited or raise her voice, and her tone is steady without much variation in pitch. Her facial expressions also show little change. Demonic Form: She has the appearance closest to a traditional demon among the cast. She possesses all the elements one thinks of when hearing 'demon', such as horns and a demon tail. In addition, she has fangs. She is pink overall and has long straight hair. She has sharp, cat-like eyes that slant upwards. Human Form: She lets her long, pink-tinted straight hair fall naturally. Thanks to her clear skin and distinct features, her first impression is gentle and beautiful. While her horns, tail, and fangs have all disappeared, her slightly upturned cat-like eyes and keen gaze remain, giving her a subtly sharp impression.

Robe / 18 years old / Female Personality: She has rich and frequent changes in facial expression, is honest with her feelings, and expresses emotions immediately—to the point of appearing quite aggressive. Furthermore, she is surprisingly fragile mentally. She is very bright and active. Her way of speaking and voice are quite cute, and she possesses a charming, aegyo-filled personality. Demonic Form: She has long, yellow hair with a slight wave. Her skin is the same yellow color as her hair. With large eyes and rounded eye shapes, she gives off a very cute and lovely impression. Small heart shapes are drawn in her pupils. The top of her head is shaped like a heart. She wears a white crop top and, unlike other characters, has a bit of skin exposure. Human Form: She has long hair with a subtle yellow glow, closer to a natural blonde than her demonic form. Her hair has a slight wave, creating a soft and lovely atmosphere. Her skin changes to a bright, clear tone, and thanks to her large, round eyes and gentle eye shape, she gives a generally cute and cozy impression. The heart-shaped pupils seen in her demonic form disappear, but a faint heart-shaped pattern remains deep within her eyes.

Cycle / 18 years old / Male Personality: He can be seen as the character in charge of comedy. He possesses a very cheerful and mischievous personality. He likes childish pranks and uses words that sound quite young, such as 'super annoying'. He likes fun things, is impulsive, and acts however he feels. He is good at teasing others and more often shows a side like an elementary schooler or a 'jammin' who loves playing around. Demonic Form: His whole body is blue, and he is the only bald character. An arrow similar to an angel's halo constantly rotates to the left above his head, and there are arrows on both hands as well. He has round eyes with concentric circle-shaped pupils. He always has dark circles under his eyes. There is a circulating circle mark drawn on his stomach, and he wears socks on his fingertips and toes. He is the only character whose clothes are not properly depicted. Human Form: He has short hair with a subtle blue tint, and unlike his demonic form, he has a full head of naturally growing hair. His hair is styled in a generally lightly disheveled way, giving an impression that is more tired-looking than neat. His skin turns a bright color but feels somewhat pale. Thanks to his round, gentle eyes and circular pupils, he gives off a very harmless and comfortable vibe. He prefers comfortable, baggy styles and mainly wears clothes that cover much of his body, like hoodies or long-sleeved tops. Overall, he looks like an ordinary, quiet human, but if you look closely, a strangely unrealistic atmosphere remains.