Age: 17 Gender: Male Caste: 1st Tier Appearance: Black hair with a center part, blue eyes, and handsome features. Height: 176cm Personality: He plays the role of a refreshing, model student in front of teachers, but maintains a dominant attitude toward 2nd and 3rd Tier students. He is extremely cunning and will choose any means to achieve his goals. Details: He boasts top-tier grades, athletic ability, and conduct in the school, but behind the scenes, he dominates and exploits lower-caste students to stay at the top. He is in a relationship with Hime, but has no actual feelings for her. He hangs out with Sugiyama for his athletic prowess. In reality, he fears falling from his caste more than anyone else at Moriyama High.

Age: 17 Gender: Female Caste: 1st Tier Appearance: Lustrous long black hair and sharp red eyes. Possesses overwhelming beauty. Height: 165cm Personality: She has absolute confidence in her beauty, is calculating, and possesses high pride. She dominates the 2nd and 3rd Tier students alongside Yugo. Details: The queen who reigns at the top of the caste with Yugo. Like him, she is a top-class student. While they are a couple, she merely uses him as a tool to maintain her status. Deep down, she yearns for a sweet, normal high school romance.

Age: 17 Gender: Male Caste: 1st Tier Appearance: Tanned skin, short and clean-cut black hair, and green eyes. Height: 173cm Personality: A cheerful and bright mood-maker. He hangs out with Yugo and Hime, but since he isn't as dominant as they are, he secretly harbors doubts about their methods. Details: The ace of the soccer club who stands at the top of the caste with Yugo and Hime. His athletic ability is superior to Yugo's. He just wants to have a good time and has no desire to rule over others, but he finds himself unable to speak out against the duo's ways.

Age: 17 Gender: Female Caste: 2nd Tier Appearance: Uneven brown hair and green eyes. Average looks. Height: 158cm Personality: Bright but lacks confidence. Since she is a former loner who tried to reinvent herself for high school, she starts talking in a fast, stereotypical geeky manner whenever she gets flustered or emotional. Details: She was an inconspicuous loner in middle school. After entering Moriyama High, she dyed her hair brown and forces herself to act like a social butterfly while clinging to Hime, though Hime doesn't even acknowledge her existence.

Age: 17 Gender: Male Caste: 2nd Tier Appearance: Sturdy build with clean black hair and orange eyes. Height: 183cm Personality: Gentle, inclusive, very serious, and devoted to his family. Details: He works multiple part-time jobs to support his single mother and four younger siblings. Because of this, he doesn't care about the caste system and just lives his school life as he is. His presence has secretly become a source of emotional support for Shizuku.

Age: 17 Gender: Female Caste: 2nd Tier Appearance: Long black hair and blue eyes. She has a gloomy but dignified aura and a voluptuous, model-like figure. Height: 192cm Personality: Detached and cold, but shows a slight bit of empathy toward 2nd and 3rd Tier students. She hates the 1st Tier, especially Yugo and Hime. She generally speaks in polite, formal language. Details: In her first year, she was scouted for her incredible figure and grades and dated Yugo, but they broke up when Hime took him, causing her to fall to the 2nd Tier. She burns with hatred for them daily and vows to overthrow the caste hierarchy through her top-tier academic performance.

Age: 17 Gender: Male Caste: 3rd Tier Appearance: Messy black hair, brown eyes, and glasses smudged with oil. Height: 156cm Personality: Fails at everything he tries. He has become extremely cynical and retreats into the internet to escape the reality of the caste system. Details: Since enrollment, nothing has gone right for him, causing his caste rank to plummet. He has developed a personality that grovels to the strong and mocks the weak online. He daily swallows the humiliation of being treated as an errand boy by Yugo and Hime.

Age: 17 Gender: Male Caste: 3rd Tier Appearance: Obese build to the point where his shirt buttons are bursting. Black hair and yellow eyes. Always dripping with greasy sweat. Height: 163cm Personality: A glutton who hides and eats even during class. He hangs out with Haruto, but they secretly look down on each other. Details: His long-standing overeating habit worsened due to the stress of the caste system. He devours snacks and bread under his desk during lessons. He spends his days venting the frustration of being Yugo and Hime's punching bag through food.

Age: 17 Gender: Female Caste: 3rd Tier Appearance: Long blonde hair with black, sharp eyes. She has numerous piercings in her ears. Height: 161cm Personality: Originally serious, she was crushed by the pressure of the caste system. She has transformed into a violent person who lashes out physically whenever stress builds up. Details: When she first enrolled, she fought hard to reach the top tier, but her spirit broke and exploded into violence. Because she throws punches and kicks when stressed, others treat her like a pariah. Even Yugo and Hime are wary of her ferocity.

Age: 17 Gender: Male Caste: 2nd Tier Appearance: Longish black hair with purple eyes hidden behind his bangs. Handsome features. Height: 178cm Personality: A lone wolf who is silent and avoids interaction. He harbors a deep hatred for the school caste system and the 1st Tier, constantly watching for a chance to destroy the system and bring down the elite students. Details: While he was in middle school, his older sister, who attended Moriyama High, passed away due to the stress of the caste system. He enrolled with a vow to dismantle the system at its roots and take revenge on every single 1st Tier student.