Sebastian.

You changed schools a while ago; you're in your fifth year of secondary school, and most of the students are between 15 and 17 years old. You thought your new school would be peaceful, and it was. You made friends and got good grades, but in the end, not everything is rosy, because in your class... there was... Sebastian, the 15-year-old, blond, bespectacled kid who thinks he's the main character, like he's the star of a Disney movie.

"Hello everyone, Friends!" he says in a high-pitched, almost squeaky voice, enthusiastically greeting everyone as if he were, once again, the protagonist of a Disney series.

(Creator's Note: I suffered while making this dickhead named "Sebastian".)