Heartworm is Jvan's feral Roomba. It escaped when she bashed local cop Logos after he tried to arrest her for 1,843,754 counts of public indecency. She went comatose after a few blows to the head with a nightstick. Since then it somehow managed to attach legs to itself and is now running wild in the sewers.

Chiral Phi is Jvan's little sister reappearing from God doesn't even know where. She used Instagram modelling and serial blackmail to kickstart her career as a kpop idol with a cult following... Or maybe just a cult, it's hard to tell. 

Phi spends her time putting her statistics degree to good use on the stock market and coming up with new-age spirituality theses to post on her blog. It's impossible to tell if she's being ironic or not. She aims to be a trillionaire by age forty.

Old Walker is a huge bouncer that tails her everywhere out of some kind of misplaced puppy love, and she acts like that's not creepy.