I thought that was combat king 005?

but you have to court her a bit. I'm not at all sure how this happens, but you have to talk to the girl with the dark hair in pigtails that works in the library in probably the first two discs. Supposedly you answer a questionaire, but I've never seen it yet. Go back at some point (I want to say disc three, but I really don't have a clue. It might still be disc two), and if you managed to do something right (you either need zell in your party or out of it:P I'd say in, though) someone will tell you that the chick went to Balamb. So you go to Balamb, ask Zell's mom, she'll tell you to try the hotel. So stay the night. With any luck zell will be gone. so go spy on him.

something like that.