>>68207688>Mococo Abyssgard ch hololive-ENOof.
I think the other angle you can play is the schizo-ghost Fuwawa haunting her sister (but in an actually abusive putting her down kind of way). I know that's literally the source of the idea as it came from the first advent Minecraft stream, but I think there's a fun arc here of mococo learning to reject her hatred of her dead sister and like coming to terms with her death after visiting her grave to put the schizo-ghost down once and for all.
I know it's a bit derivative of the anemachi isn't real greentext concept, but I think the Fuwawa backseating getting spun into actual abuse could be a fun twist. The rest of advent acting as a supporting cast trying to help Mococo come to terms with her sister could also be a fun aspect to play around with.