Hmm... well first I have Ashton Belle, fellow dorm mate and Hufflepuff sixth year. So obviously they would know each other, if they liked each other or not. I don't know how Cordelia would like Ashton's rebellious ways, though she has the nature of being sweet (just as Cordelia does).

However, I don't see Ashton liking any ounce of pretentious nature in the girl, but I don't know if that would really effect her opinion greatly of her.

Perhaps we could have them not on the best of terms or sorts? I'm not sure, it could go either way. Either them tolerating each other and being friends, or having faint dislike of one another, but since they both are sweet in nature, try to put up with the other.