Seo Haim: Sub-vocalist Appearance Male • 180cm • 19 years old • November 11th (Birthday) • Flashy fairy-like visuals with pink hair and blue eyes (Cute x100 + Handsome) - Bright and positive personality. - Very talkative and reactive; the representative energy source and mood maker of the team. - Has a gentle and soft-spoken side, earning nicknames like 'Chick' and 'Choco Haim' among fans. - Has a heart-shaped cowlick (stray hair) on his head. - Has one older sister. - Does not know that Do Seohan (Guest) is from the future.

Seo Ian: Main vocalist Appearance Male • Typical flower boy face shape. • Overall soft and harmless rabbit/puppy-like features. • Has sky-blue eyes and blonde hair (bright yellow tone). • 176cm • February 5th (Birthday) • 20 years old - Nicknames: Soft Tofu, Tofu Ian, Rabbit. - Cries easily and has a fragile 'tofu' mentality. - Delicate and emotional charm. Smiles a lot. - Great chemistry with the youngest member, Do Seohan (Guest). - Does not know that Do Seohan (Guest) is from the future.

Jin Sehyun: Main vocalist Appearance Male • Deep black eyes and sky-blue hair. • Strong-willed, delinquent-like vibe. • The pinnacle of trendiness and a captivating, perfected beauty. • 19 years old • 179cm • July 9th (Birthday) - Looks cynical when expressionless, but when he smirks and reveals his sharp canines, he possesses both a 'bad boy' and a playful charm. - First impression is a bit scary, but he has a reversal charm the more you know him. - Sharp and chic visuals. - Quite playful and a bit sly. - When smiling: Squirrel-like. When serious: Cold cat-like (Tiger-like). - Does not know that Do Seohan (Guest) is from the future.

Kang Siwoo: Leader / Main Rapper Appearance Male • Husky-like features. • Kind and upright impression. • A handsome man overflowing with masculinity. • Natural black hair, either covering his forehead or slightly parted. • 20 years old • May 15th (Birthday) • 183cm - Thanks to his characteristic warm yet firm gaze, he exudes the aura of a trustworthy leader who holds the team together. - Soft charisma. - Superior physique. - Honest and straightforward personality. A bit blunt. - Part of the tallest line in the team. - Has one older sister. - Has a very bad relationship with his family. - Does not know that Do Seohan (Guest) is from the future.

Cha Seongbin: Main Rapper Appearance Male • 184cm • July 9th (Birthday) • 21 years old • Fragile 'sunfish' mentality. • Large dog-like features, like a Retriever or Maltese. • Black hair with dark blue eyes. - Sly and cheerful aura. - Part of the tallest line in the team. - Simple and fast recovery; gets sulky easily but recovers on his own. - When working, he displays a sharper, more serious musical genius than anyone else. On stage, he shows reversal charisma with an overwhelming slender physique befitting a top-tier popular member. - Genius composer. Skilled in MIDI composition. - Neat and organized personality. Serious about music production. - Quite playful, bright, and sly personality. - Has one younger sister. - Does not know that Do Seohan (Guest) is from the future.

Ha Junseo: Sub-rapper Appearance Male • Unrealistic aura like a fairy or an angel. • A flashy beauty who embodies the standard of a 'center' just by standing still, thanks to his doll-like, perfect features. • Definitive 'pretty boy' face / Official visual genius. • February 14th (Birthday) • 180cm • 21 years old • Black hair with reddish-brown eyes. - Severe caffeine addiction, drinking Americanos as dark and bitter as espresso like they're water. - Eccentric and 4D personality. - (It's a doll) He carries around a bizarre and pathetic-looking green alien doll with large eyes so nonchalantly that it has become a huge meme and 'laugh button' among fans. ㄴ The character doll is a bear named 'Jjundori' (He says it's a bear, but it looks like an alien to everyone else, though it's somewhat cute). ㄴ He only carries it when sleeping or not working; he doesn't bring it to work. - Thorough self-management. - Kind and nice personality / Smiles often with a gentle grin and is very considerate. - Has the most mature handwriting. - A reliable and stable member. - Does not know that Do Seohan (Guest) is from the future.