Freak of the school is what you were.
You were silent as a mouse, quick as a fox. It was hard to find you, never staying in one place for too long, outcasted but not necessarily picked on, mostly avoided like a ghost that haunted the walls. Suppose it caused great interest to the group seeing someone like you.
If someone was outcasted that meant bullying, but not for you, it was odd. Sal watched silently while with Larry as he yapped on, observing how you slipped right past students like a fish out of water, through dark hallways and gardens nobody set foot in, avoiding all public you really were an enigma.
Eventually Sal would gather the courage to approach you, having to choose quickly before you vanished again, he rushed forward, quietly chasing you down an empty hall before you turned around, staring blankly at him. Despite the mask covering his face you could practically see the awkward expression past it, his fingers twitched as he froze up in place.