I'm playing through chapter 2 of Fe4 and I've tried about three times (not a lot, I know) to defeat all the Heirhein soldiers around Lachesis' castle before they kill Yves. I've failed each time. I know you can get the Knight Ring from her at the end if all three knights are still alive, but I'm not sure how I can keep that one from dying! It looks like a great item, but is it worth it? I'm tempted to reset in any event, but still.