Accidentally killed the Filthy Woman - how to get back to white?

I got sloppy with my Uchi and I accidentally killed the Filthy Woman. I was wanting to fight Miralda on my first playthrough but after killing Filthy and 2 body deaths, it looks like I'm far from that goal. I'm still a bit unclear on how character and world tendencies work. Is there a way for me, off-line, to get my character tendency back to white?