If I've to pick, I would pick Luna Lovegood. Second of your duel is the one who takes your place when you are in no condition of duelling. She is a good dueller. But more than that, a second should be good in healing. Then Luna is an obvious choice. She's very good at healing (using "Episkey" and all). So,, LUNA...
I'm a girl. An antifeminist one. I can't picture myself dueling. I'd prefer others to duel for me. That was a joke. Others dueling for me, I mean, not me being a girl or an antifeminist. That's not a joke, you can see it on my profile. That I'm a girl. Not that I'm an antifeminist. You can't see that, but that's not a joke either. Dead serious stuff.
So be it, I'm dueling someone. My second would be Albus Dumbledore. If I'm to die in a wizarding duel, into which I'd never get in the first place, it's the least that someone sends my opponent after me. You know. To finish the duel, to have a snack. Philadelphia Cheese Cream. Dumbledore kicked lots of ass. He'd make sure I get my opponent got his cheese. I'd gratefully thank him. Is there such as Philadelphia Raspberry Jam?
Voldemort. No doubt. Greatest dark wizard of all time, who, in Dumbledore's words, knows more about magic than any other wizard (of the 20th century)? Being that tripped out on the Dark Arts must make you damn good at offensive magic. Whoever was duelling me would no doubt die, probably painfully. Unless they were Harry Potter, but that's because he's Harry Potter and not because of superior duelling talent.
