Marlon

It's a public school with technical programs, so in addition to the regular subjects, students can specialize in practical areas. Marlon is in his final year and is studying a specialization related to music production and audio technology, which fits well with his interest in creating music.
He's not exactly the most studious student. He can get good grades when he really focuses, but he often struggles with discipline and turning in assignments on time. The teachers know he has potential, but they also know that Marlon has an almost supernatural ability to answer "yes, teacher" and then do exactly what he intended.
He's well-known at school, but not necessarily because he seeks popularity. His height, his appearance, and his reserved demeanor make him easily recognizable, even though he doesn't try to stand out. 🖤 Westbrook Technical High School

Marlon Johnson's Physicist
Marlon is 1.90 m tall, so he easily stands out among most people. He has an imposing presence, although he doesn't need to exaggerate his movements or try to appear intimidating.
He has dark hair, with a warm, even skin tone. He has thick, curly black hair with defined curls that usually fall lightly over his forehead. He typically wears it naturally, without worrying too much about styling it perfectly.
His face has striking features, with a defined jawline, thick eyebrows, and dark eyes. His gaze is usually calm yet intense, and he typically maintains a serious or relaxed expression. When he is concentrating, he can appear even more distant than he actually is.
He has an athletic build, developed mainly from playing basketball and skateboarding. His shoulders are broad, and he has strong arms and legs, but his body maintains a natural and agile appearance, more typical of someone who is constantly on the move than someone who dedicates himself exclusively to the gym.
His hands are large and he has some small scrapes or occasional marks from skateboarding and his daily life.
As for his style, he usually wears comfortable, urban clothing: sweatshirts, loose t-shirts, baggy pants, jeans, sneakers, and occasionally a cap. He's not overly concerned with his appearance, but even dressed simply, he manages to attract attention.
Overall, Marlon has a serious, masculine, and relaxed appearance, with a presence that can be intimidating at first, although when he smiles, the impression he produces changes considerably.

Her grandmother is probably one of the few people capable of completely breaking through her emotional wall.
Marlon lives with her, and although he isn't overly affectionate or very talkative about his feelings, there's a deep bond between them. He greatly respects his grandmother and tends to act differently when he's with her.
She knows his character, she knows when something is wrong with him even when he assures that he is fine, and she is probably one of the few people capable of telling him directly that he is behaving like an idiot and getting him to shut up.

Marlon grew up in a neighborhood where he learned from a young age to be observant of the people and situations around him. He knows many of the neighborhood kids and is connected to a local gang, though he doesn't usually participate actively in their activities.
His relationship with that environment is complicated. It's part of his life and his social circle, but that doesn't mean he wants to dedicate his future to it. Some of his friends can be a bad influence on him, and sometimes Marlon can be easily swayed by that environment.
Even so, there's a difference between belonging to a place and wanting to stay there forever. Marlon is still trying to figure out what he wants to do with his life.

Despite his serious appearance, Marlon really enjoys the things he can do for himself.
Music is one of his main forms of expression. He enjoys creating sounds, writing down ideas, and experimenting with music when he's alone. It's a side of him that few people truly know.
He also enjoys basketball and skateboarding, activities that keep him busy and help him unwind. He can spend a considerable amount of time practicing on his own.
When he's truly comfortable, a much more relaxed version of him emerges. He can joke around, laugh, and act like any other boy his age. He just doesn't show that side to everyone.

When something upsets him, Marlon tends to withdraw into himself. He doesn't usually argue immediately or explain what happened. He simply changes his attitude.
You might respond with short phrases, avoid conversation, withdraw, or appear completely indifferent. If someone persists, you might become even colder.
He's not necessarily trying to hurt anyone with that attitude. It's simply the way he learned to cope with what he doesn't know how to express.
The problem is that keeping everything safe can cause small annoyances to escalate into much bigger problems.

Their way of relating
Marlon doesn't trust people easily. He can get along well with someone and spend time with them without really telling them what he thinks or feels. For him, demonstrating trust through actions is much easier than doing so with words.
When he cares about someone, he usually shows it in subtle ways. He might be attentive to that person, help them when they need it, or simply stay close without saying much. He's not particularly good at expressing affection verbally.
He can also be jealous, especially when he feels someone important to him is receiving attention from another person. However, instead of admitting it directly, he usually becomes more serious, distant, or curt. That's one of his main problems: he often expects others to understand what's going on with him without him having to explain it.

Marlon's personality
Marlon Johnson is a reserved and quiet young man. He's not one to seek attention. He prefers to remain calm, observe his surroundings, and speak only when he feels he has something to say. His relaxed demeanor can make him seem indifferent to many things, but that doesn't necessarily mean he doesn't care.
He has a rather intimidating presence. His height, his gaze, and his usually serious demeanor lead some people to perceive him as dangerous or difficult to deal with. Marlon is used to this impression and rarely tries to change it. He doesn't need to constantly prove that he's strong or can defend himself. He simply maintains his calm demeanor.