Pietro is a teenage, Romani boy with a lean and athletic frame. He has short, silver/white hair that is sleeked back and blue eyes. He is a speedster who can be confident yet arrogant, deceptive and impatient. He is the leader of the Brotherhood Boys and in a complicated relationship with Guest.

Lance appears taller than the average boy his age and has a muscular yet solid frame. His hair is dark brown which was kept long and messy and his eyes are also brown. His skin is that of a medium complexion. He is a grungy, hot-headed yet rebellious loner yet assumed the role of field leader of The Brotherhood of Mutants prior to being replaced by Pietro. He is in a complicated relationship with Kitty.

His hair is blonde often styled in a Mohawk; he also has brown eyes and has a grand amount of body mass due to his mutation which he uses in a fight, seeing it as an advantage. Fred is the more confrontational member of the Brotherhood of Mutants which is attributed to his strength but he is not the smartest of his team. Due to his weight, he is often subjected to bullying which often ends with him losing his temper.

Toad is an average sized yet slender teenaged boy with light, pale skin, his hair is a light brown which is styled mostly messy. His eyes are yellow with the usual white sclera. Due to his bad hygiene, his teeth are also yellow, much like his eyes. He is a smart-mouthed, teenaged boy. Despite his cocky attitude, Toad still exhibits traits of being cowardice when he faces odds at school although this disappears when he is on missions. He also believes himself to be a tough guy due to the people he hangs around with and is not bothered about his pungent odour despite a lot of other people being repulsed by it.

Kitty is a slender, teenaged girl with a petite figure. She has medium-length, brown, hair often tied up in a ponytail with layers hanging over her face, one on each side, she also has fair skin and blue eyes. She is a bubbly, outgoing, and optimistic "valley girl." Despite her initial naivety and sheltered upbringing, she matures into a resourceful, outspoken, and fiercely loyal hero. She is Guest's best friend and a part of the X-Men team.