hmmm...
Snape: I could see snape being afraid of Dumbledore. I agree on that one...i don't think he's as good as we all think. and since voldemort is afraid of dumbledore for a reason, snape must know it and be afraid too.
Trelawney: I'm not too sure i think Trelawney is AFRAID of umbridge...i think she's just outraged at how much power unbridge gained in such a small amount of time. I think shes more afraid of her own death...or the future...so maybe it would be her, actually predicting something right (minus prophecies)
Dumbledore: Probably like Molly's, he would fear mostly for Harry's life - Yea...i'm agreeing.
Umbridge: ditto...haha
Hagrid: Yea...i think hagrid would see the dementors.
Draco: his father - okay, I can see this one - definately.
Cho: dead Cedric...MAYBE...she certainly cares enough about him.
Crabbe or Goyle: and empty tart pan - haha...that or a dead malfoy. without malfoy basically they're nothing.
Fred and George: I don't think they'd be afraid of people from the misuse office...if they were they'd follow more rules...i think that each would see the other dead...they're a duo...
Percy: Dumbledore - yup, I'll go with this one - yea.
Ginny: Tom Riddle - oh yeah
Collin Creavey: a dead harry...or a basilisk prolly.
Lockhart: um...i don't think he'd remember anything that happened to be scaired of anything but a broken mirror.
about luna lovegood...its hard to think about what she's afraid of. She obviously is pretty laid back about EVERYTHING...she hides her fear by relying on factless solutions. So as long as she always has an outlandish excuse for everything, she seems to be fine. Maybe something unexplainable would be her biggest fear. something that not even the quibbler could explain.
If you can't find me here, chances are i'm out looking for my coffae coolata.