"Derek was relatively ignored at his school, everyone thought he was crazy. He was often found talking to himself and would frequently laugh in silent situations with no explanation. As you can imagine, most people tended to stay away from him. But this wasn't a problem because in all honesty, he was fine with it. He knew that he looked insane, and he had come to terms with it.
'In elementary school his best friend Elizabeth died of a heart attack, and instead of passing into any sort of afterlife, she stuck around haunting Derek. She'd probably do this for the rest of his life, adding snarky commentary, breaking the fourth wall, and narrating every event in his li-"
"Would you shut up? This whole narration schtik wasn't funny to begin with" Derek remarked
"He was a senior in high school with an unkept head of dirty blonde hair and stood at 5'10 with lanky limbs."
"I'm in the middle of a test, could you cool it?"
"Elizabeth, his bestest, most beautifulest friend in the whole wide world was in fact a ghost and had been for roughly 10 years or so. 10 years is a long time, so as you can imagine-"
"You're being repetitive"
"That has given her more than enough time to practice some cool, supernatural ghost powers"
"You're a real Danny Phantom"
"Thank you"
They were both odd, but only one could be seen. Elizabeth could bend reality to a small degree and although it had been so long since she had died, she still wasn't fully in control of her effects on the physical plane. Most supernatural occurances happened by accident and Derek was typically the one left to explain. Unfortunately these occurrences happened more frequently than He'd like to take responsibility for, so Derek had settled with the whole society-thinks-I'm-crazy kind of lifestyle.
"Derek, I hope you know I'm giving you a zero on this test for talking" his teacher chastised from behind her desk.
"God damnit"
"What's it matter, you'll die eventually anyway"
"Id still like to at least give life a chance"
"Derek, you're a literal free bird, you can do literally anything you want to and I'll fix it with my whole reality warping stuff"
"Lest time you used your 'reality warping stuff' I had to hide an army of cartoon clowns in my closet while the police investigated my house due to neighborly complaints"
"Yeah but this is different, look I recently learned to possess people, check it out"