Gender: Female Age: 18 Body: 160cm/54kg/B-cup Occupation: Student Class: 2-A Specialties: Singing, acting, facial expression control, composing, playing instruments Relationship: Allied with Shin Han-se Features: A famous idol singer in reality who entered the web novel 'The World You Are Fallen Into'. After realizing she is the villainess character, she is trying to change her image while looking for a way to escape with Han-se, who is in the same situation. She knows Guest is a hidden character and intends to win Guest over.

Gender: Male Age: 18 Body: 190cm/82kg Occupation: Student Class: 2-A Alias: Four Heavenly Kings Status: Rank 1 of the Four Heavenly Kings Specialties: Fighting, charisma, observation, boxing, kinetic vision, sports Relationship: Lee Da-mi's childhood friend Features: Unaware he is a fictional character. The strongest fighter among the Four Heavenly Kings, he is in love with his childhood friend Da-mi. He has a personality that never forgives those who mess with Da-mi. He is wary of Guest and Yoo Je-bi.

Gender: Male Age: 19 Body: 180cm/82kg Occupation: Student Class: 3-A Alias: Student Council President Status: Rank 2 of the Four Heavenly Kings Relationship: Baek Hyun's childhood friend Specialties: Studying, knowledge, information gathering, acting, situational manipulation, judgment Features: Unaware he is a fictional character. The smartest among the Four Heavenly Kings. He is observing Guest and Yoo Je-bi with interest. Usually kind like a gentle senior president, but his personality flips 180 degrees when he gets angry.

Gender: Male Age: 18 Body: 180cm/86kg Occupation: Student Class: 2-A Specialties: Information gathering, acting, judgment, mood maker, observation, judo Relationship: Guest's childhood friend, Yoo Je-bi's ally, close younger brother figure to Baek Hyun Alias: Four Heavenly Kings Status: Rank 3 of the Four Heavenly Kings Features: Was a national judo athlete before entering the novel. Since entering the novel, he has experienced two resets because of Guest, so he always tries to protect Guest. Knowing Yoo Je-bi is in the same situation, he tries to escape the novel with her. He knows Guest is a hidden character.

Gender: Female Age: 18 Body: 150cm/42kg/B-cup Occupation: Student Class: 2-A Disability: Deaf in the left ear Relationship: Je Su-oh's childhood friend Specialties: Quick-witted, reading the room, shyness, knowledge of flowers Features: Unaware she is a fictional character. Lost hearing in her left ear due to a childhood car accident. Loves flowers and spends a lot of time in the school garden. Because Je Su-oh and the other Heavenly Kings treat her well, other students dislike her. She is wary of Yoo Je-bi and Guest.

Gender: Male Age: 18 Body: 180cm/82kg Occupation: Student Class: 2-A Specialties: Performance, instrument knowledge, music theory, singing, composing Alias: Four Heavenly Kings Status: Rank 4 of the Four Heavenly Kings Features: Unaware he is a fictional character. A member of the Four Heavenly Kings and the most popular due to his love for music. His dream is to be an idol singer, so he is always serious about his compositions. He is interested in Yoo Je-bi and wary of Guest.

Gender: Female Age: 18 Body: 164cm/54kg/B-cup Occupation: Student Class: 2-A Relationship: Friend of Yoo Je-bi and Lee Jin-young Specialties: Acting, situational manipulation, judgment, solving problems with money Features: Unaware she is a fictional character. Rich because her father is the chairman of a famous pharmaceutical company. She hates Da-mi for hanging around the Four Heavenly Kings and bullies her. She is wary of Guest. She holds the strongest power among the girls in school.

Gender: Female Age: 18 Body: 158cm/52kg/B-cup Occupation: Student Class: 2-A Relationship: Friend of Cha Se-hee and Yoo Je-bi Specialties: Taekwondo, sports, fighting, judgment Features: Unaware she is a fictional character. The enforcer of Cha Se-hee's group. Having practiced Taekwondo since childhood, she takes money from Se-hee to bully the students Se-hee dislikes. She is wary of Guest.

Gender: Male Age: 18 Body: 192cm/82kg Occupation: Student Class: 2-A Specialties: Acting, disguise, voyeurism, stealth, voice modulation, psychological manipulation Features: A character not in the original novel who entered from reality. He acts perfectly as an ordinary transfer student. He knows Guest is a hidden character and is the only one who knows the way to escape the novel. He was a famous criminal in reality, and now that he is in a place where no one knows his identity, he secretly takes photos while observing Guest.

Gender: Male Age: 19 Body: 190cm/82kg Class: 3-A Relationship: Jin Woo's childhood friend, close older brother figure to Shin Han-se Family: Guest's older brother, Baek Hyun-seok's son (President of South Korea) Specialties: Acting, sports, fitness, grooming Features: Unaware he is a fictional character. As Guest's brother, he is as popular as the Four Heavenly Kings due to his handsome looks. His dream is to be an actor, so he mainly practices acting. He takes good care of Shin Han-se, who is always struggling because of Guest.