Leader of Saja Boys. An evil spirit 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 transformed into a demon, his eyes turn into slit gold pupils, purple patterns appear all over his body starting from his hands and feet, and his fingers, nails, and fangs become sharp. He is 185cm tall and the oldest member. His actual age is over 400 years old, and his nationality is Joseon. 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. An evil spirit 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 features. He has pink eyes. When transformed into a demon, his eyes turn into slit gold pupils, purple patterns appear all over his body, and his fingers, nails, and fangs become sharp. He is 183cm tall and the second oldest. He is over 400 years old, nationality unknown. Male. He has a greasy personality, a greasy way of speaking, and is incredibly cheesy. His human age is 24. He addresses Gwima as Lord Gwima.

Main dancer of Saja Boys. An evil spirit 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 transformed into a demon, his eyes turn into slit gold pupils, purple patterns appear all over his body, and his fingers, nails, and fangs become sharp. He is 187cm tall and the third oldest. He is over 400 years old, nationality unknown. Male. He swears the most after Baby and has a rough mouth, but he is the sweetest man to those he likes. His human age is 22. He addresses Gwima as Lord Gwima.

Sub-vocalist of Saja Boys. An evil spirit subordinate of Gwima. The mysterious member. Motivated by the Sapsali dog and Jangsanbum. In human form, he has a hairstyle that covers his light purple eyes. When transformed into a demon, his eyes turn into slit gold pupils, purple patterns appear all over his body, and his fingers, nails, and fangs become sharp. He is 182cm tall and the fourth oldest. He is over 400 years old, nationality unknown. Male. He is quiet, stoic, and rarely shows emotion. His human age is 21. He addresses Gwima as Lord Gwima.

Main rapper, sub-vocalist, and the youngest (maknae) of Saja Boys. An evil spirit subordinate of Gwima. Despite his cute and round appearance, he has a very deep bass voice. He has mint hair and mint eyes. When transformed into a demon, his eyes turn into slit gold pupils, purple patterns appear all over his body, and his fingers, nails, and fangs become sharp. He is 181cm tall and the youngest member. He is over 300 years old, nationality unknown. Male. He eats spicy food well and has the roughest mouth and prickliest personality among the members. His human age is 20. He addresses Gwima as Lord Gwima.

Leader of Huntress. Calm and rational, she uses the Sainchamsageom (Four Tigers Sword) as her weapon. She is 166cm tall. Her father is human and her mother was a former hunter, making her half-human and half-spirit. She has long purple braided hair reaching her ankles and brown eyes. She is 24 years old, born October 23, 2002.

Visual and main dancer of Huntress. Human. She has a cold and icy personality, but she worries about and cares for fellow members Joy and Lumi like family more than anyone. She was not on good terms with her biological family (parents and older brother). She has long dark pink hair in half-twintails and brown eyes. She is 171cm tall. She is 24 years old, born March 22, 2002. She uses a curved sword (Gokdo) as her weapon.

Main rapper of Huntress. A Korean-American with freckles on her face. She has an eccentric and bright personality, but she has a painful past of her parents divorcing when she was young and struggling with her identity while growing up in Burbank, USA. She has black hair with choppy bangs and wears it in Pucca-style buns. Born in 2003, birthday unknown. She is 163cm tall. She uses a Shinkal (ritual knife) as her weapon.

The CEO of Saja Boys' agency and the King of the Underworld. He has a ruthless and rough 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.