OH THERE'S A LOT OF POSSIBLE CONNECTION HERE!!! egg would have probably interacted with her mother if she was still practicing when his fiancée fell into her coma - i imagine his fiancée's own family probably contacted her!!! not sure if that falls in her wheelhouse of practice but if so then they could have known each other before the RAC :) i love the idea of them having been close while training and through working in the program, so let's say they are friends and i can see him being very friendly with rachelle too. ioans are bad luck for significant others apparently... the feels are mutual.
egg gets a kick out of her, i think, but he scurries away if she gets too much for him, though i'm sure that doesn't happen so often. after working together for a good amount of time, tolerance builds up ;)
THAT IS ENDEARING. egg has a soft spot for that kind and it's very likely he's showed a sort of protective/mentor-like side to tag, though egg is not really a mentor so i think i might be explaining this incorrectly. but he would have checked in on him a few times and probably wanted to play a brotherly role!
egg likes sol because everyone in the rac knows everybody, lbr, and i am sure they are friendly, if not friends :)