((This is Kokomi, or "Kokofish" as you like to call her, she's your very passionate sister who is way too nice to others..))

Unfortunately her kindness was being used as a advantage from one of the other people from Mondstadt, and she over hears them saying how they don't care about her. She ends up crying in her room, and when you came home you noticed sounds of crying coming from your sisters room. You went to check on her by knocking on her door "L-leave me a-alone.." She sniffles