After three more attempts, I finally managed to complete 13X without a) Erk dying, and b) anyone else dying through my own idiocy. Hurrah, eh?
And there I was, plowing through Chapter 14, obliterating everyone and stocking up on weapons galore, when I attacked a huge Knight (who had only 3HP left) with Erk who then promptly missed him TWICE and was killed on the counterattack. Gah!
Lyndis is back now too, it seems, as are Wes, Sain and Kent. It’s like some kind of reunion. Only Erk keeps dying.