Pansy - Of course. Not jealous at all. No reason to be. I mean, sure, Arden's a hot Pureblood girl, but she's not a threat. Incapable of love and she can't ever replace Pansy's place in Theodork's heart, so she has nothing to worry about. Considering they were in the same House and the same Year, I think they'd be friends, yeah? She's good in Arden's book, anyway.
Lily - I don't know if she'll dislike her, but she definitely won't care much for her. If they meet up, it'll be one of those situations where it'll either end well or end badly. Arden's pretty okay in general, but we'll have to see how it goes. Maybe she'll stop by her shoe shop someday.
Justin - She doesn't like him. Mudbloods. More likely than not, she probably didn't even notice him during their school days. If she did, it wouldn't have been very pleasant. At all.
Remus - Well, yes, likewise, she would remember him from school. She doesn't have much of an opinion about him, but she's not fond of Order members as a rule.