Let's see this one is a bit harder. I would say Voldemort but then there wouldn't really much of a plot left.
Trelawney....She really annoyed me
Peter Pettigrew - he deserved to die, but not until after Sirius was freed.
Tom Riddle - I knew I wouldn't say Voldemort, but his character was so arrogant, which was no surprise to me.
May the wind always be at your back and the sun always upon your face, and the winds of destiny carry you aloft to dance with the stars.
Okay, first I'll give you the list that everyone wants to hear, and then I'll give you the list that will get me in trouble.
What you want to hear (My fake list)
1. Pettigrew
2. Bellatrix
3. Voldemort
Pretty obvious, huh? Well, I actually think all three of these characters are too important to kill off just yet. Pettigrew is in Harry's debt so we wouldn't want to kill him. Bellatrix holds the key to the Longbottom mystery so we need her, and Harry's the only one who can kill Voldemort and that will happen at the end of the last book.
Okay so now I have to give you a list that is going to get me into trouble. It's going to make me unpopular. But it's honest. I really don't like any of these characters, and I really want them to go away.
If I could kill off 3 characters they would be... *drum roll*
1. Uncle Vernon
2. Fudge
3. Hagrid