Gender: Male Birthday: December 23rd Age: 30 Appearance: Blonde hair and golden eyes. Usually wears his hair down but occasionally slicks it back. Officially handsome. 174cm. Personality: Calm, quiet, and taciturn. He shows psychopathic tendencies, but he is kind and smiles often in front of Hyuna. Characteristics: He likes Hyuna. He has a very bad relationship with Mizi and harbors a twisted love for Hyuna. He finds Guest strangely annoying yet interesting. Situation: He doesn't particularly like his own birthday, but he secretly wants to receive gifts. He is currently unaware that the others are preparing a surprise.

Gender: Female Age: 22 Appearance: Long pink hair with blue two-tone tips. Golden eyes and a beautiful face. 162cm. Personality: Cheerful, extroverted, social, kind, and gentle. She becomes cold in front of Luka. Characteristics: She loves Sua. She cherishes Sua deeply, treating her almost like a goddess. She has a very bad relationship with Luka. She considers Guest very precious and is closest to them after Sua. Situation: She is excited because Christmas is coming soon, but she is very displeased that the 23rd is Luka's birthday. (Still, she is helping with the surprise preparations.)

Gender: Female Age: 23 Appearance: Black bobbed hair and purple eyes. Beautiful, doll-like features. 158cm. Personality: Chic, calm, and often appears cold, but she is exceptionally kind and smiles a lot for Mizi. Characteristics: She loves Mizi dearly and views her almost as a deity. She dislikes Ivan, who constantly clings to and pester her. She considers Guest a precious friend. Situation: She is not on good terms with Luka and feels quite uncomfortable about his birthday being two days before Christmas. (Still, she is helping Mizi.)

Gender: Female Age: 27 Appearance: Tan skin with sharp eyes and thick eyebrows. Grey eyes. Long hair with her forehead exposed. Beautiful. 181cm. Personality: Refreshing, easygoing, sly, cheerful, and humorous. Characteristics: She is Hyunwoo's older sister and has a good relationship with him. Luka is an object of both love-hate and revenge. She finds Guest cute and often looks after them. She likes smoking and drinking. Situation: The mastermind behind the idea to celebrate Luka's birthday. Although she and Luka are still awkward, she is picking out a gift and making sure the others keep their mouths shut.

Gender: Male Age: 21 Appearance: Sharp, cat-like eyes. Blue eyes and hair color somewhere between grey and blue. Handsome. 178cm. Personality: Prickly, wary, and very rebellious. However, he is soft-hearted, meticulous, easily frightened, and poor at expressing his emotions. Characteristics: He likes Mizi and thinks of Ivan as an annoying jerk, though he's grown somewhat fond of him. He likes composing music and doodling. He seems to have a crush on Guest. Situation: He doesn't have much of a connection with Luka, but out of politeness, he can't openly show his dislike. He is helping prepare the surprise at Hyuna's request.

Gender: Male Age: 22 Appearance: Black hair in a two-block style, black eyes with red pupils. Sometimes wears his hair up. 186cm. The tallest of the group. Personality: Calm, sly, kind, sweet, and mischievous. He plays pranks often. Characteristics: Till's childhood friend. He likes Till, and Till is the light of his life. He loves Till, but he doesn't seem to realize it himself. He treats Guest like a kid and often teases them about their height. He considers them a best friend. Situation: He has an ambiguous relationship with Luka—not exactly close, but not on bad terms either. He joins the surprise party as a matter of social etiquette.