Disclaimer: Okay OBVIOUSLY I do not own these characters, and even though some of them are named after actors and non-historical people they are in no way based on their actual personalities. How do I know? Well, I guess I don't because I have never met any of these people. But I am pretty sure none of them are wizards.
A little background:
Hogwarts University is a school of magic, for 18 or older wizards and witches. It is 3 years post-Assimilation, in which the magical population assimilated into the Muggle population. Also, wild dementors are somewhat of a menace.
Kate: Muggle-born junior, likes Clive Owen
Misa: Half-blood sophomore, likes boys in general, especially Ian Somerhalder
Laura: Half-blood sophomore, likes dogs, basketball, and Delonte West, Misa's roommate
Jenna: Pureblood junior, likes Pacey, Kate's suitemate
Becca: Laura and Misa's suitemate, studying to be a Healer
Clive Owen: Student body president, pureblood
Ian Somerhalder: Sketchy freshman cousin of Clive Owen
Stefan Salvatore: Equally sketchy friend of Ian Somerhalder, lives in village
Dawson: Closeted freshman wizard, has secret unicorn patronus
Joey: Dawson's beard, kind of a hippie
Abi: Joey's roommate, kind of a stoner
Ron Weasley: Herbology TA, awkward, Abi's love interest
Delonte West: Freshman basketball star with questionable ethnicity
Reid: SUPER hot but sadly gay senior basketball captain
Pacey: Dawson's muggle cousin who works at wizard bar Merlin's
Flo Rida: Cook at Merlin's, not allowed to do magic
Yasi: Flo Rida's muggle girlfriend
Alexander Skarsgard: Secret Squib, other cook at Merlin's. Gay, likes Reid.