Knowing me? Ask them how in god's name they expect to get into anyone's pants the way they're going about it (because generally most of them are hopeless), then proceed to show them how it's done, on my partner ofc and then make out with said partner, hopefully they've learn something useful from my lesson and if not, I'm still a winner~ ;)

Make out with them and even if for some reason the person still won't go away, I'm sure we'll be too busy to care either way~<3 ;)

Cling to him I suppose, not sure what else to do >_<

... Beat the shit out of them, of course.

Slap them.

If someone was hitting on Seiya, I'd just have my army attack them~

Well, I'd be pissed off but not like there's much to do about it, right?

Most likely punch them in the face

Honestly I think I'd just kiss Ethan in front of whoever is hitting on him, if they can't take a hint after that, I suppose there's not much else to do~

I would hug my girlfriend close to me and glare at them until they went away.

Nothing. My gf and I would ignore them.

Cry :(

I don't know what I'd do. Probably cry.

Challenge them to a fight.

I'd pull their hair.