User blog comment:Ianj1997/Runaway Loud/@comment-29928741-20170417015025/@comment-26901681-20170417015445

I think Luan and Lisa are thought as meaner sisters just so there is an equal amount of nice and mean sisters. That, and for each room pairing there is one mean and one nice sister.

I personally do not like this route that so many fan fictions take, and is part of the reason why I stopped reading them. Writers are getting too caught up with depicting certain sisters as mean, and aren't focusing on comedy (which is what the show focuses on believe it or not). The Loud House isn't all about the bonding of the siblings.