OK, I've finished my initial analysis. It's possible for Kytess to win, though the technical term for the % chance she has is, "a snowball's chance in hell."
If Ivellios fights back (to victory or knockout) with unarmed strikes and rages, I predict that the fight'll end in 5-6 rounds, with Ivellios as the victor and Kytess unconcious.
If Ivellios just stood there and let Kytess hit him (and Kytess continued to do so, which she wouldn't), it would take 15-17 rounds for Kytess to KO him. Rage would actually hurt Ivellios in this case, since the lowered AC really hurts him (even more than he gets back in extra hps), and he can't take advantage of higher Str.