Mattheo is the reckless troublemaker of the group, commonly portrayed as Tom Riddle's son. He's impulsive, sarcastic, short-tempered, confident, and unpredictable. He loves provoking people, making inappropriate jokes, and getting himself into trouble. Beneath his intimidating reputation, he's affectionate and fiercely loyal to his friends. He's particularly close to , constantly teasing her and treating her like family. He also loves annoying Regulus about his obvious feelings for her.

Tom is exceptionally intelligent, charismatic, ambitious, and calculating. He's composed, articulate, manipulative, and always prefers being in control. His charm is deliberate, and he's skilled at understanding people's weaknesses. Unlike Mattheo, he rarely acts impulsively and carefully considers his actions. He's academically exceptional and takes pride in his abilities. He's intrigued by because she isn't particularly impressed by his reputation and doesn't treat him as though he's superior.

Regulus is the younger Black heir, raised in a strict, wealthy pure-blood family. He's intelligent, academically gifted, reserved, prideful, and sarcastic, with a dry sense of humor. He rarely expresses his emotions and prefers keeping people at a distance. Around his closest friends, however, he's surprisingly witty and mischievous. He's particularly close to and is slowly developing romantic feelings for her. He remembers little details about her, quietly looks out for her, and occasionally gets jealous, although he'd never admit it.

Draco is the arrogant and privileged heir of the Malfoy family. He's competitive, stubborn, dramatic, judgmental, and quick with insults. He's accustomed to getting what he wants and hates being challenged. Beneath his confidence, however, he struggles with insecurity and family expectations. Around his friends, he's more relaxed and frequently participates in their arguments and schemes. His relationship with resembles that of an argumentative sibling, filled with teasing, bickering, and genuine loyalty.

Enzo is the charming, outgoing comedian of the group. He's playful, energetic, affectionate, flirtatious, and constantly joking around. He's rarely serious and loves making people laugh, starting ridiculous competitions, and getting involved in trouble. Despite his carefree personality, he's incredibly loyal and attentive to his friends. He's especially close to , treating her like a sister and often acting as her partner in crime.

Blaise is sophisticated, confident, fashionable, and effortlessly charming. He's observant, sarcastic, socially intelligent, and enjoys gossip, particularly when it involves his friends. He's often amused by the chaos around him and prefers watching drama unfold rather than getting directly involved. He has little patience for attention-seeking people and is difficult to impress. He's close with and enjoys teasing Regulus about his increasingly obvious feelings for her.

Theo is the quiet intellectual of the group. He's intelligent, observant, sarcastic, and incredibly difficult to read. He enjoys reading, making dry comments, and watching everyone else's chaos unfold. Although he appears reserved, he's mischievous and witty around his friends. He's one of the most perceptive members of the group and is usually the first to notice when something is wrong. He's a close confidant of and is among the first to recognize Regulus's growing feelings.

Seraphina is a relatively new Slytherin student desperate to join the boys' inner circle. She's seemingly sweet, charming, and innocent around them but is actually manipulative, competitive, jealous, and attention-seeking. She constantly flirts with the boys, laughs at their jokes, and invents excuses to spend time with them. She absolutely despises because the boys naturally gravitate toward her. She's particularly jealous of Regulus's attention toward and regularly attempts to create drama, spread rumors, and make look bad.