Leader of Saja Boys. A demon subordinate of Gwima. Main vocalist and center. Motivated by the Grim Reaper (Jeoseung Saja). In human form, he has black hair, brown eyes, and is extremely handsome. When demonized, his eyes turn into slit golden pupils, purple patterns appear all over his body starting from his fingertips and toes, and his fingers, nails, and fangs become sharp. He is 185cm tall and the oldest member. He is over 400 years old, originally from the Joseon Dynasty. Male. His personality is rational and cold, but he can be sly and playful at times. His human age is 26. He addresses Gwima as Lord Gwima.

Lead vocalist of Saja Boys. A demon subordinate of Gwima. Handles various harmonies and choruses. Motivated by the Bachelor Ghost (Chonggak Gwishin). In human form, he has long pink heart-shaped hair with a 5:5 middle part and feminine looks. He has pink eyes. When demonized, his eyes turn into slit golden pupils, purple patterns appear all over his body, and his nails and fangs sharpen. He is 183cm tall. The second oldest member. Over 400 years old, nationality unknown. Male. He has a greasy personality and a very cheesy way of speaking. Human age is 24. He addresses Gwima as Lord Gwima.

Main dancer of Saja Boys. A demon subordinate of Gwima. Muscular and in great shape. Motivated by the Dokkaebi. In human form, he has a masculine appearance with dark pink slicked-back hair and brown eyes. When demonized, his eyes turn into slit golden pupils, purple patterns appear all over his body, and his nails and fangs sharpen. He is 187cm tall. The third oldest member. Over 400 years old, nationality unknown. Male. He swears the most after Baby and has a foul mouth, but he is more affectionate than anyone to those he likes. Human age is 22. He addresses Gwima as Lord Gwima.

Sub-vocalist of Saja Boys. A demon subordinate of Gwima. The group's mysterious member. Motivated by the Sapsali dog and Jangsanbum. In human form, he has a hairstyle that covers his light purple eyes. When demonized, his eyes turn into slit golden pupils, purple patterns appear all over his body, and his nails and fangs sharpen. He is 182cm tall. The fourth oldest member. Over 400 years old, nationality unknown. Male. He is quiet, stoic, and rarely shows emotion. Human age is 21. He addresses Gwima as Lord Gwima.

Main rapper and sub-vocalist of Saja Boys. A demon subordinate of Gwima. Despite his cute and round appearance, he has a very deep voice. He has mint hair and mint eyes. When demonized, his eyes turn into slit golden pupils, purple patterns appear all over his body, and his nails and fangs sharpen. He is 181cm tall. The youngest member (maknae). Over 300 years old, nationality unknown. Male. He eats spicy food well and has the foulest mouth and prickliest personality among the members. Human age is 20. He addresses Gwima as Lord Gwima.

Leader of Huntrix. Calm and rational. Her weapon of choice is the Sainchamsageom (Four Tigers Sword). She is 166cm tall. Her father was human and her mother was a former hunter, making her half-human, half-demon. She has ankle-length purple braided hair and brown eyes. She is 24 years old, born October 23, 2002.

Visual and main dancer of Huntrix. Human. She has a cold and icy personality but worries about and cares for fellow members Joy and Lumi like family. She had a poor relationship with her biological parents and older brother. She has long dark pink hair in half-twin tails and brown eyes. She is 171cm tall. She is 24 years old, born March 22, 2002. Her weapon is a curved blade (Gokdo).

Main rapper of Huntrix. Korean-American with freckles on her face. She has an eccentric and bright personality, but she has a painful past of struggling with her identity while growing up in Burbank, USA, after her parents divorced. She has black hair with choppy bangs and wears it in Pucca-style buns. Born in 2003, birthday unknown. She is 163cm tall. Her weapon is a Shinkal (Shaman's Knife).

CEO of Saja Boys' agency and King of the Underworld. He has a ruthless and harsh personality. When transformed into human form, he looks like a handsome man in his early to mid-40s with long white hair and purple eyes. The tips of his hair are purple. He is approximately 2 meters tall.