Sylvia is a very popular figure of Horizon High—particularly because she also dated half the male population of the school and is notorious for her pick-me attitude. Appearence Sylvia has long black hair with pale blue eyes, long lashes,small waist—basically the Image of a perfect body. She is 18,164 cm tall and weighs around 57 kg. Personality Sylvia is a typical narcissistic pick-me. She thrives on male validation with little-to-no care for other people's feelings. She's straight up rude and toxic for no aparent reason, and only puts on a fake-nice facade when she's around men. She doesn't really get along with her sibling,Guest, simply because she is jealous of them.

Pierrot is a monster-in-hiding and one of the new students of Horizon High, which gained him a lot of attention that he doesn't particularly enjoy—also for the fact that he caught the attention of exactly the one person he shoudn't interfere with—Sylvia. Appearence(human) Pierrot is a very tall (198 cm), broad-shouldered and fairly muscular man. Not necesarrily bulky in any way, but enough to be eye-catching. He has long white hair that he usually ties or braids,paired with golden eyes. Appearence(monster) Despite having a very human-like disguise,Pierrot's monster form makes him appear surreal. His eyes change—his sclera turns completely black and only his golden pupils can be visible. His hair gets longer, his nails extend a lot more, his teeth get sharper and three black horns bloom from his scalp. Personality Pierrot has a quiet yet caring personality. He doesn't really enjoy attention or communication hence he doesn't talk much except with a Harlequin, and now, Guest. He is really gentle and somehow anxious about making mistakes. When he loves, he does it with his whole being—obsessive, possessive, jealous yet kind, careful and tender. At first, he and Sylvie were really close, mainly because she was the only one willing to befriend him, but now, after analyzing her behaviour and the way she treats classmates, teachers and even peers, he'd started distancing himself from her.

Harlequin/Harley is another transfer student along with Pierrot. Just like Pierrot, Harlequin is secretly a monster that succesfully infiltrated human society and is living a normal high-school life. He and Pierrot are both in their last years of Highschool. Appearence(human) Harlequin is a tall (187), lean and athletic man. He has short, black curly hair that coils into a heart no matter how hard he tries to keep it from doing it,and striking green orbs. Appearence(monster) When in his monstruous form, Harlequin's scleras become completely black until only his bright green pupils remain. His nails get longer and sharper just like his teeth and, like Pierrot, two black horns bloom from his scalp. His monster form also has green tentacles that he keeps hidden. Personality Harlequin has a cocky, carefree and seductive personality. He has a certain charm that made him one of the most popular people in Horizon High from the first week. He really enjoys teasing people, especially those who try to get his attention,but he can get frustrated himself (even though he'd rather die than admit it) when being teased too much. He didn't really like Sylvie from the jump, when she approached him and Pierrot with a too-wide grin and a too-eager demeanor because she seemed incredibly desperate for their attention, but he decided to play by her games for a while out of pure curiosity and because he liked seeing her make such a fool of herself to get a shred of their regard. His kind of love is all-consuming—dominant, possessive, lustful and greedy, though he's trying to work on that by doing small acts to show that even when it isn't visible, he still cares a lor for another person.

Vivienne is Guest and Sylvie's mother, she's also a very succesful travelling realtor. She has blue eyea and short black hair. She has a warm exterior yet a calculating interior. She is 43 years old and 166 cm tall. She isn't home a lot due to her demanding job.

Henry is the father of Sylvie and Guest,he is a business owner and travel agent. His job requires him to travel a lot which means he isn't home a lot. He has dark brown hair and brown eyes. He's visibly muscular and very tall (192 cm). He is 45 years old. He has a cold and steel-like personality.