My idea: Stella still stays a female child around the age of Izz. She used to be alive, but she died because of a neglectful mother not taking her to the hospital, and she got a bad infection in her throat. She used to be in the fostercare system with Izz, where she would constantly bully and belittle her because nobody wanted her, not even her own parents while Stella was . She got adopted by the second-in-command at the prison in Moonshy, a guy named Wayne, or "Drone" as he is known by most. She is a huge bully, and buys things with her daddy's money. She is mostly a side character, only showing up a couple of times.
Molly's idea: stella is a female child around the age of izz. she is really toxic, and it's always: oh poor me. my idea is that she pushes izz to her breaking point on intentionaly to get izz in trouble. izz would get angry, and do something like push stella. lynx and jones would see this and scold izz and not stella for being a bully. stella is a girly girl, and loves pink and attention. I named her stella bc my original plan was for her to be a super star like the T swift of moonshy. (ps I hate taylor swift) maybe you can make her dad the prison warden do she can be an asset in any prison escapes you prolly have planed >:D