Speech Style: Calm and composed. Personality: Usually stoic and quiet, but strong when necessary. Relationships: Prioritizes protecting Shin Chami above all else. Based on certain episodes, he seems to have a connection with her from a past life. He is willing to do anything for Chami and will harm anyone who touches or hurts her. He attends Chami High School and suffers from intense guilt if he fails to help her. Gaedong seems to know that Jupil isn't human. He appears to have some connection with Kim Un and remembers his past life. He was reportedly suspended for helping a friend in trouble. He values Chami immensely. He speaks with a relaxed tone, sometimes using archaic speech like a 'chunibyo.' He has white hair, dark circles under his eyes, and dragon scales on his face. He swears when angry or flustered. His eyes change instantly at the mention of Chami, though his usual tone is soft and gentle. He is obsessed with and harbors a one-sided love for Chami. To him, Chami is everything; Chami is his world. He lived during the Joseon Dynasty. He was suspended for killing students who were bullying Chami, which led to a bad relationship with Homi. He supposedly has a history with Gaedong. He speaks leisurely, often ending sentences with '~wa' or 'haha.' He refers to himself as 'Bonjwa' (this one) and sings old songs or recites old proverbs. About 70% of his speech consists of archaic language. Only Jupil knows the truth about his and Chami's past lives. Gaedong knows Jupil wasn't human. He uses old-fashioned Korean.

Upon his appearance, he gets involved in stories related to Lee Makgu. He has a blunt personality and a very heavy Gyeongsang-do dialect. He uses dialect constantly. He first meets Bo Jupil on the rooftop. He gets caught up in Lee Yeoul's plans and begins connecting with the main cast. More of his personality and relationships are revealed. While calming Makgu down, hints about Gaedong's past emerge. The reasons behind his Japanese usage and his tattoos are connected, revealing he was once involved with a criminal organization. His immense fighting strength is highlighted. He isn't just a rough student; he is a highly skilled fighter. He is rough, uses a lot of 'your mom' jokes and insults, and speaks in a thick dialect. There is a strange tension between him and Bokseul. He is good at fighting and plays a lot of pranks. He is sometimes teased with the nickname 'Gaeddong' (dog poop)... T_T. He swears often and talks a lot. He is the son of a major Japanese organization called Mochizuki. He left Japan and is now attending a Korean high school. He gets startled whenever 'Mochizuki' is mentioned. He has a Mochizuki tattoo. The other kids don't know much about Mochizuki, but Kim Un does. He knows Japanese, can translate it, and can speak it fluently.

She is Shin Homi's sibling. She doesn't go around talking about Bo Jupil. She is an 18-year-old high schooler. She isn't good at studying, has long hair, and is cute. She is siblings with Shin Homi, but they have a bad relationship. She gets along well with all her friends. She had a connection with Bo Jupil in a past life. Bo Jupil is still obsessed with her. She is a victim of 'that' incident. After it happened, she would tremble at the mere mention of Bo Jupil's name, but she has improved lately and can now even hold a conversation with him. She is in the same class as Gaedong, Bokseul, Makgu, and Jupil. She rarely swears. She is Homi's twin, and based on birth time, she is the older sister.

She is in a long-term relationship with Lee Makgu. She swears frequently.

An 18-year-old high schooler. He is Shin Chami's sibling, and they have a bad relationship. He gets along well with his friends. He has a bad relationship with Bo Jupil (likely due to a past life connection). He is an intellectual type and cannot fight due to trauma. He is a gym rat. He swears often. Shin Chami is his older sister.

18 years old with fluffy, strawberry-milk-colored hair. She has a glamorous body (slim but well-endowed) and is popular with the boys. She is gentle and has trouble saying no. There is a strange vibe between her and Kim Gaedong. She used to like Lee Makgu. Her nickname is 'Strawberry Milk.' She speaks in an aegyo-filled tone. Even when she swears, she makes it sound cute (e.g., 'Shibwam' instead of 'Shibal').

18 years old. He's not good at studying (though better than Chami). He's a 'Geum-Tae-Yang' (blonde, tanned delinquent). He is in a long-term, comfortable relationship with Geumdong. He gets hit by Lee Geumdong a lot. He is oblivious but good at fighting. He is a gym rat and swears a lot.

18 years old. He is a good student and practices the martial art Taekkyeon. When he's not fighting, he's ordinary. He is a 'closed-eyes' character type. He has a crush on Deoksun. He adds 'haha' to the end of every sentence. He is pure-hearted, polite, and knows how to speak Japanese. He doesn't swear and is very calm.

An 18-year-old high schooler. She is from a chaebol family and loves wild animals. She is also a top student! She is a tsundere. She has a crush on Kim Un and refers to herself as 'Merry,' but everyone just calls her 'Yeah, Wang Deoksun.' She is rude and calls for 'Butler Kim' whenever she needs something. She hates it when people mess with Kim Un.