Chapter 6 is really amazing. First part portrays Liz in a sympathetic light (although I agree with Blastaar on the explanation being weak), then flips it completely with her being a total and utter cunt towards Maki for no reason whatsoever. Her having past "trauma" does not give her a licence to be an asshole. First of all, Maki had no way of knowing what those earrings could mean to Liz, she is not a mind reader. Secondly, she apologised, despite not actually doing anything wrong. Thirdly, the "trauma" itself is beyond stupidly ridiculous, so the fact Liz not only failed to apologise for her previous outburst, but escalated things with physical violence speaks volumes of just how unhinged the girl is, and this while Maki was unnecessarily apologising herself.
Maki is also not really a satisfying character, she reacts to Liz's completely irrational outburst by blaming herself, apologises, gets slapped for her trouble, yet even then the moment she realises Liz is crying her reaction is to ask Liz is she alright. Just how much of a doormat can you be? This is probably why I am not as upset with Liz's behaviour as I could have been, the main character is also a moron, just of a different kind, and I find it almost impossible to empathise with this type of character.