This arc had so many holes in it that I dropped it on chapter 6 and only came back to see what this was years later. This specific instance was so pointless, it's clear the author had a vision and he forced it to happen no matter what.
Master was so great. I was her slave until her dying breath. I wouldn't even want revenge on the family. I'd be happy that dude freed me from slavery and I'd fuck off wherever with my OP magic. Seems stupid to want to be some noble's meat shield when he has the ability to live on his own freely.