User blog comment:IamJakuhoRaikoben/Chapter 457: Naked Battle, Review./@comment-24102956-20151019142707/@comment-5894890-20151019151752

While I like to think that, to me, that just doesn't seem the like the case this time. It is a grudge between a kid and an adult (unless Brandish is a lot older than I think she is...). I doubt Layla assassinated anyone or pissed someone off to the point where a kid(Brandish) has held on for like 20 years+. So... it's probably close to the family related theories o_o.