Well, he is in Kefkas tower, which means he's got the bulk of his characters on the ground somewhere or another.

I mean, if he hasn't used any guides, he could easily be missing Shadow and Gogo, and possibly Umaro if he didn't follow Mog's advice to find him.

(Then again, if he is getting though the game via vanish/X-zone, he's probably read a guide all the way through...)

But Relm's hp seems to indicate she is getting use, at least relative to Edgar and Sabin.