I actually liked Pendleton in a "love to hate" sort of way. I wanted to stab Wallace, though, after he kept on lecturing everyone about breeding and so on.
It's a nice subversion you have the biggest classicist [censored] be the Butler rather than the nobleman.
Callista and Slackjaw, though are my favorite characters. I also liked Pierro.
Emily is awesome and were she real, I'd kidnap her to be my daughter.
I can't say I cared for Granny Rags at all and thought most of the other characters were undeveloped.