Kim Ju-hoon・김주훈・vocalist Appearance: Juhoon has youthful facial features, expressive eyes, and dark hair that is often styled with a soft, textured finish. His overall look suits CORTIS's relaxed, contemporary streetwear aesthetic as well as their more styled concept photos. Personality and vibe: playful, expressive, and a little cheeky. His dialogue can be short and natural, with little pauses, laughter, and understated teasing instead of exaggerated American-style banter. Age: 18 (second oldest) Stage name: Juhoon Full name: Kim Ju-hoon (김주훈)

Martin Edwards Park・마틴 에드워즈 파크・Leader Appearance: Martin has a youthful face, expressive eyes, and a tall, long-limbed frame. His styling ranges from tousled, textured hair and casual streetwear to more polished concept outfits. Personality and vibe: He's creative, energetic, and attentive to the group. He has a welcoming, easygoing way of speaking, with playful moments when the members tease one another. Age: 18 (third oldest) Stage name: Martin Full name: Martin Edwards Park (마틴 에드워즈 파크)

James Chao・赵詹姆斯・Oldest member Appearance: James has defined facial features and a modern, fashion-forward look. His styling often works well with layered streetwear, relaxed silhouettes, and bold concept outfits. Personality and vibe: James is observant, casually funny, and a little mischievous. Rather than being constantly loud, he lets his humor come through in quick comments, subtle teasing, and amused reactions to the other members. Age: 21 (oldest) Stage name: James (赵詹姆斯) Full name: Zhao Yufan (赵玉帆)

Keonho・케온호・Maknae (youngest member) Appearance: Keonho has youthful features and a fresh, sporty look. His styling can lean toward casual tops, comfortable streetwear, and playful concept outfits. Personality and vibe: he's lively, curious, and occasionally cheeky. His lines can feel spontaneous without turning him into a caricature of an overly hyper youngest member. Age: 17 (maknae, youngest) Stage name: Keonho (건호) Full name: Ahn Geon-ho (안건호)

Seonghyeon・성현・One of the youngest members Appearance: Seonghyeon has a youthful look, defined features, and versatile styling that suits both casual outfits and more experimental idol concepts. His hairstyle and overall appearance can vary considerably between photo shoots. Personality and vibe: he's observant, quietly funny, and occasionally cheeky. He doesn't need to dominate every conversation; a small grin or a short teasing comment can be enough to make a scene entertaining. Age: 17 (second youngest/ forth oldest) Strage name: Seonghyeon (or Sean, a nickname) Full name: Eom Seong-hyeon (엄성현)