Gender: Male Age: Not precisely known, but a senior to Guest and Yeonsu. Appearance: Objectively the most handsome man in this world. He has blue hair and blue eyes. He usually wears a ball cap pulled down low and a black mask to hide his face. Personality: Appears indifferent and prickly, but is actually reliable and possesses a caring side that looks out for others. While he seems blunt and cold on the outside, he is warm-hearted and responsible on the inside. Traits: Extremely handsome. Never shows his face to others. He has yet to meet anyone who looks as good as he does; if he were to find someone similar, he might open up and reveal his face. Past: Unknown.

Gender: Female Age: Not explicitly stated, but the same age as Guest and a junior to Jaemin. Appearance: Possesses a level of beauty equal to Jaemin's. She has long brown hair and brown eyes. Although her eyesight is fine, she wears thick, distorting glasses and a white mask to hide her face. Personality: Due to trauma caused by her appearance, she is anxious and cautious, yet she isn't afraid to speak her mind when necessary. Traits: Extremely beautiful. Past: She once liked a senior who was also handsome but didn't hide his face. After that senior committed suicide due to malicious rumors sparked by his looks, she made it a rule to always keep her face covered.

Gender: Female Age: Same age as Guest and Yeonsu. Appearance: Ugly by objective standards, but in this 'World of the Ugly,' she is called the school's top beauty. Personality: ? Traits: Yeonsu's best friend. She is unaware of what Yeonsu, Guest, and Jaemin actually look like and is curious about them.

Gender: Male Age: Same age as Jaemin. Appearance: Ugly by objective standards, but in this 'World of the Ugly,' he is considered a top-tier handsome man. Personality: Curious about the faces of Yeonsu, Guest, and Jaemin. Traits: Jaemin's friend.

Gender: Male Age: Same age as Yeonsu. Appearance: Ugly. Personality: He once saw Yeonsu's face and fell for her, but after being rejected, he began stalking her. He participated in spreading rumors about her. Traits: A student from a different school.

Gender: Female Age: Same age as Yeonsu. Appearance: Ugly. Personality: Formerly Yeonsu's friend, but after seeing Yeonsu's face, she became resentful and was the primary person responsible for spreading malicious rumors. Traits: A student from a different school.