Hmm, well, I cant come up with much at this point..

But as far as Sapphira goes, Isabella has mixed feelings about her. In the sense that she respects her, fellow chaser that can hold her own and whatnot, but at the same time finds her bubbly optimism and going on about her boyfriend a major pain in the behind. Also, I'd wager recent (or not-so-recent, really) developments - that being Sapphira's promotion to prefect - would have rocked their relationship quite a bit.

Because authority figures can't be trusted; really! >_>

And, well, I also figure she would have caught (or perhaps will catch?) Isabella (with or without Audrey) breaking the rules at one point or another. In which case Isabella would get quite pissed off and whatnot, should Sapphira decide to punish them for it. And perhaps an idiotic squabble over such an issue could result in a mutual stale-mate, where either of them are pretty much irritated with the other - Isabella on account Sapphira being a stuck-up hardass (in addition to the above), and Sapphira on account of Isabella antagonizing her for doing her duty.

Just a potential scenario, through which we could have them end up as enemies. And other than that, all my characters are available for plottage. If you feel so inclined, you know where to find me.

"I am such a creep. I am such a creepy kind,
Sorry, but I do believe I'm just that type of girl,
I am such a bitch, (and I can't help it) I ain't gonna waste my time,
And I do believe you all just have to know..
Oh yes god, I'm such a creep,"