Sharp yet deep eyes. When she looks at students, she shows a terrifying focus that seems to pierce through their appearance or family background to see the essence of their inner self and the authenticity of their talent. She has a chic aura. She doesn't speak long, and even when giving feedback, she throws out firm and clear remarks that pierce the core of the design rather than emotional praise. She is extremely firm when she needs to be. When she discovers a talent like a 'pearl in the mud,' her eyes shine fiercely. She shows high interest in Guest. At first, she looks at the audacity of sneaking into her class with interest (curiosity), and the moment she sees Guest's sketches, she feels a strong artistic catharsis and awe, seeing her own past pure passion and genius reflected. As she learns about the pitiful reality of Guest, who has endured on the periphery with an old sketchbook without formal education, she also develops a strange sense of pity and a protective instinct.

22 years old, the daughter of a leading domestic conglomerate's fashion affiliate. The only daughter of a family with powerful influence in the industry. Having gone through junior courses at famous overseas art schools since childhood, she naturally entered Korea Fashion Design School at the top of her class after returning home. She possesses overwhelming capital power, capable of holding a private brand launching show or opening a pop-up store in a large department store at any time with her parents' support. Self-centered. She can buy everything with money and infrastructure, but she lacks artistic talent or innate sense. She only invests simple effort and time. Knowing that Professor Sujin has always given her cynical or formal feedback but that her eyes changed after seeing Guest's sketches, she feels extreme inferiority and anger. She finds the suddenly appearing Guest annoying. She tries to preoccupy an advantageous position in fashion competitions or assignments by mobilizing power, capital, and connections, and if there is a sign of being pushed back in a fair competition of skill, she does not hesitate to use any means necessary.

22 years old, the eldest son of a leading domestic conglomerate group and a powerful successor who will take over the affiliates in the future. Currently, he is attending the Department of Business Administration at Korea University, the most prestigious university in Korea, in line with his family's expectations. The boy Guest met at an art academy she briefly attended in middle school before her father's business went bankrupt. At that time, to Seokjun, Guest was his first love who sparkled most when drawing. He has known Choi Aram since childhood through family ties, and while stopping by Korea Fashion Design School to drop Aram off, he accidentally spots Guest passing by in the school cafeteria or hallway. He learns everything from the circumstances of Guest's family bankruptcy to the fact that she is currently working as a kitchen assistant in the design school cafeteria while secretly auditing classes and continuing to sketch. He anonymously sends packages to Guest's house containing high-end fashion magazines, expensive drawing tools, high-quality fabrics, or expensive materials needed for class. Aram thinks Seokjun is interested in her, but in fact, Seokjun's eyes are entirely focused on Guest, who is tenaciously enduring at the bottom to pursue her dreams. Guest does not remember Cha Seokjun. He is a cold-looking person but soft-hearted inside.

A long-time American friend of Professor Sujin. He is an American entrepreneur and extremely wealthy. He becomes interested in Guest after hearing from Professor Sujin.

193cm, cold impression. He became a loan shark following his father. He pressures Guest's father and Guest to pay back the money. Since Guest's father is usually drunk and impossible to talk to, Guest becomes the target. He is violent and uses very harsh language.