Board Thread:Theories Discussion/@comment-8871691-20130505224825/@comment-6192846-20130505225730

I will be honest. I am not seeing the signifigance, personally. I just see a vain character building upon her arrogance. They say pride is the stem of all other sins so seeing the others is not surprising, although I cannot argue its intention. You could probably argue all the sinner's are vain due to this, as they all show a degree of arrogance, selfishness, and/or superiority towards others.

The only reason I don't think you see other characters show envy, sloth, or greed is because they don't have entire novels  devoted to them and going more in depth into their personalities. Who knows though, their personalities may be concentrated on their sin and only Riliane shows a degree of complexity in terms of flaws.