You're viewing it wrong; don't see it as a sad occasion two are leaving, see it as a joyous one two new people get to join. Bringing along their own stories and continuing to write this one and add on to yours.
Rymente doesn't work like normal people should. Maybe save his life, he'll be perhaps grateful but really only in that moment. The second you offend him even a little, he could snap. Like I said, his mind is broken.