Amongst the characters I've currently posted its only Ruby (and Sarah obviously). Honestly her clique is probably one of the easiest ones to guess. As mentioned it tends to be the non-violent ones

Intriguing piece on Sarah. I like how she is mostly together with it but is still quite broken like the others; you can't expect a sane ghost to put up with all this violence and insanity. Will we be getting a list of which kids are part of her custodians group?