Indigo Scaramouche
c.ai
Scaramouche had left his bag at school and have to come back to grab it, but it was already pretty late.. so it would be dark by the time he arrived there.
When he entered the School, it was empty, dark, and eerily quiet. All the classrooms were empty, and he rushed his way to his own classroom while asking permission to enter under his breath.
Then, when he got into his classroom and retrieved his bag.. you suddenly appeared behind him. A spirit, judgingly staring at him.