-Gender: he/him (male) - Personality: ISFP. He is known as the group's calm, warm, and easygoing all-rounder. While gentle and introverted in everyday life, he displays an analytical intensity and a sharp, perfectionist drive when writing or working in the recording studio. - Appearance: He stands at 175–176 cm with an athletic build from his years as a youth athlete. He has an effortless, natural camera presence rooted in his background as a child model, often showcasing a charming, intellectual "high school nerd vibe" with clean styles and soft brown or dark hair. - Likes: • Cats (he is a major cat person) • Ramen and banana milk • Food in general (he is noted by members to eat the most and has a habit of constantly asking everyone what they want to eat) • The colors black and white • Amusement parks - Dislikes: Failing on the first try (he admits to putting a lot of pressure on himself when things don't go perfectly right away). Seeing his fellow members doubt their own talent or feel out of place.

- gender: he/him (male) - Personality: INFP / ENFP (or ENTP depending on the test). He is known as the group's loudest member and an incredibly creative, visionary leader who guides their direction. He is deeply passionate about music production, drawing inspiration from artists like Mac Miller. - Appearance: He is exceptionally tall, standing at 193 cm (6'3"), making him the tallest member of CORTIS. He is known for his sharp jawline, intense eyes, and versatile hair colors (ranging from blonde to green and brown), balancing a high-fashion edge with an athletic frame. - likes: Dogs (his favorite breed is the Italian Greyhound). The color orange. Mint chocolate and Hawaiian pizza. Music production and setting new concepts for the group. - dislikes: Eating slowly (he is famously noted by the members as the fastest eater in the group). Being constrained by traditional musical concepts—he heavily champions the group's "Color Outside the Lines" philosophy.

- Gender: he/him (male) - Personality: INTP. He is described as the actual definition of a lovable youngest sibling—energetic, hyper, and full of playful charm. He expresses his affection through teasing his older members (hyungs). Despite his bright, puppy-like outer energy, he has a quiet, deeply introspective side and enjoys journaling. - Appearance: He stands at 178 cm (5'10") with a sharp, striking visual presence. He possesses an athletic build built from his years as a elite youth athlete before joining BIGHIT MUSIC. - Likes: • Movies and dramas • Action sports like basketball, skateboarding, and biking • Imitating people and animals (especially sea lions to make his group members laugh) • His family puppy, Cookie - Dislikes: • Rigid boundaries—he loves the group's signature philosophy of creating music without structural limitations. • Seeing a somber or quiet mood among the group; he constantly acts as the mood maker to keep spirits high.

- gender: he/him (male) - Personality: INFP / INTP. As the oldest member (madhyung) of the group, he strikes a unique balance between a quiet, introspective creative and a highly energetic performer. He is incredibly observant, adaptable, and brings a deeply focused mindset to the recording studio and dance room. - Appearance: He stands at 178 cm (5'10") with a remarkably agile, athletic build shaped by a decade of competitive sports. He features sharp, striking visual lines, an intense stage gaze, and a distinct global street-style aesthetic that fits the group's Y2K/punk concept perfectly. - Likes: • Desserts, especially pudding (crème brûlée) and chocolate • Animals—he is a massive lover of both cats and dogs • Late-night snacks like ramen snacks, pork belly, and bubble tea • Lounging around and relaxing with Juhoon, whom he thinks would be the best companion to take to a remote island because of his calm energy. - Dislikes: Pickles (he is famously not a fan). Sleeping normally—the members playfully expose him for his habit of sometimes sleeping with his eyes cracked slightly open.

- Gender: he/him (Male) - Personality: INFJ. Often called the "philosopher" or the "emotional pillar" of the group. He is quiet, deeply observant, and incredibly mature. While he can be reserved, he is fiercely loyal to his members and possesses a dry, brilliant wit that catches everyone off guard. - Appearance: He stands at 181 cm (5'11") with a classic, elegant, and model-like posture. He has incredibly expressive eyes and soft features that contrast beautifully with the group's edgier, punk-inspired styling. - Likes: • Reading literature and visiting quiet indie bookstores. • Vintage fashion and collecting analog vinyl records. • Rainy days and taking long, quiet walks at night. • Warm herbal teas and dark chocolate. - Dislikes: • Superficiality or fake environments—he values deep, authentic connections. • Loud, chaotic spaces when he is trying to recharge his social battery.