I know this character was only mentioned once, but could you tell us a bit about Jo, from episode 8 The Freeze?
Jo is a bit of a foil. Every selfish person has one, or thinks they do. The friend-of-convenience (yes, she does live nearby) who will listen to their complaints, act as backup, be the less-interesting, less-pretty, less-desired accompaniment that makes them shine even brighter. Or at least, that's how Lily sees it. In reality, Jo is probably a bit overly patient with Lily's self-centred shenanigans, but is in every way cleverer, kinder, braver. Unlike Lily, she won't end up miserable, disappointed, and bitter, unable to leave and unable to grow. Jo moved at her own pace and rode into her own sunset. Wherever she is, she's forging her contentment . Lily was never able to say the same.