Merlin - is a little err confused by Courtney. Sometimes she's snidely at him, sometimes she's nice! So he's pretty much just rolling with whatever she says before he makes a solid opinion. He doesn't dislike her in any way, he just... doesn't get her.

Dean - really doesn't have strong opinions /o\ He's pleased that here's a girl he can make out with!! And... yeah that's it. At least he remembered her name!! And he'll look out for her when he can too. She's also fun to talk to, which is something Dean enjoys.

Kirk - has no opinion beyond "will tap that".