[He doesn't notice her right away, being entirely focused on his mission and all, so Peridot will be treated to several minutes of Zim examining things and at one point finally demanding that one of the game operators tell him where to find the glue. From observing one thing should be very apparent: Zim does not have a lot of experience with carnivals. None at all, in fact. Irkens aren't exactly the types to indulge in frivolous entertainment that doesn't involve pain or conquest.

Eventually however, Zim does notice. His first instinct is to glance around and see if any of her drones are stalking him, then start glaring back. For several more minutes. It's a glare-off before he realizes this is interfering with his mission, so he stalks over and speaks rapidly, all in one breath.]

I know I'm incredibly amazing and you can't help but be in awe in my presence but I'm on an extremely important mission right now and your ugly is distracting so begone with you!

[And he waves a hand for emphasis. That should take care of her.]