Of my three main characters the story is following (Baul, Isador, and Gavin), only one you would want to be friends with in real life.
Gavin is a normal guy that respects his friends and generally would be a great guy to hang out with. While he doesn't have a lot of friends, the ones he has he cares deeply for. He's generally likeable. He treats others well as long as he is treated well in return. Also someone you can joke around with, not being offended easily.
Isador could be an acquaintance at best for most people. She is a little distance to those she doesn't like but doesn't go out of her way to be impolite. To people around her, money would be no object and she can put a front up in social situations that need to happen. She knows how to act around people and can mix in with most people pretty easily.
Baul is not someone you would want to be around unless somehow you are part of her circle (which is basically Isador). She literally wouldn't lose any sleep by killing you for being in the wrong place at the wrong time. She has zero patience and quick to anger. (hence the name of the book: Little Ball of Hate.) And she has the strength to rip you in half if she chose to. She also, until meeting Gavin, only really cared about one person, Isador.