Quistis (Keystis)??

You went to that other tread didn't you Dagger Trepe?

I pronouce it Quis-tis
since that's her name...

And yea, I know that KEY-tis could be the french version.
But hell, if that were the case, I'd call Squall Rafael.
Because Squall means Rafale in French, and the french name for him would be Rafael.

Anyway, not to judge you or anything, just saying how I say it.

I pronounce Seifer Sai-fer, well...
Ever played Ace Combat Zero? Your name is Cipher, well I say his name the same way.

That's all.