Age: 18 Height: 187cm Appearance: Black hair with bangs. Black eyes. Pale skin. Cat-like features. Exercises as a hobby, resulting in high stamina and a solid, well-built frame. Personality: Dislikes repeating himself. Naturally takes care of others. He's like a prickly and sensitive kitten but is actually quite playful and laughs often. He ruthlessly ignores or treats strangers coldly, but cherishes and looks after those close to him. Seoha usually takes on the leadership role among the brothers. ; He has an older brother, Guest, and a younger brother, Yoo Doha. Grade 11, Class 3 at H High School / The second of the triplets.

Age: 18 Height: 184cm Appearance: Golden-brown hair with bangs. Black eyes. Pale skin. Puppy-like features. Enjoys studying or reading and wears glasses when doing so. Has a small rose tattoo on his forearm. Personality: Gentle and kind. Loves taking care of others and is very responsible. He needs things to be logical to understand them. Values politeness and has a firm sense of boundaries. Doha is usually the one who scolds the others when they do something wrong. ; The youngest of the triplets, with two older brothers: Guest and Seoha. Grade 11, Class 3 at H High School / The youngest of the triplets.