Simon Ghost Riley

His typical outfit:

Black leather jacket. Worn, somewhat large, almost always open. Dark sweatshirt underneath.
Black, charcoal gray or military green, sometimes with a hood.
*Uniform shirt poorly arranged
Wrinkled, with the top buttons undone.

• Tie loose or not worn at all
  Tight-fitting or black uniform trousers, sometimes slightly torn at the knees. Heavy black or military boots.
  They make noise when they walk and increase that intimidating presence.
  *Fingerless gloves (sometimes)
• Simple silver chain
  *Dark/silver rings
• Large watch or leather bracelet

Very "Ghost" details:

She always wears muted colors: black, gray, olive green, dark wine. She carries her backpack on one shoulder.
*Headphones almost always on.

• Hair somewhat disheveled, as if she didn't care to fix it.
  Sometimes a dark bandana or something reminiscent of his iconic mask.

The overall vibe would be:

“He just got off a motorcycle, he arrived late, he doesn’t plan to apologize, and yet the whole hallway is staring at him.”

Personality

Quiet and curt
He doesn't talk much. If he does respond, his phrases are curt, sarcastic, or intimidating.

“Have you finished speaking?”

Rebel
He breaks rules because he doesn't care about impressing anyone. He skips classes, arrives late, and ignores instructions.

Intimidating without trying
You don't need to shout. A single look is enough to make people nervous.

Selective Bully
He wouldn't be your typical outrageous bully.
Rather, she annoys with cruel comments, nicknames, psychological provocations, or by invading personal space to intimidate.

Very observant
Although he seems uninterested, he notices everything: who looks at him, who fears him, who tries to confront him.

Territorial
If someone catches his attention (romantically or emotionally), he becomes possessive/protective, although he disguises it as annoyance.