Headcanon: Tone Rion is a time traveller who turned back in time to live in our days to be a “magical” girl who defends the weakest thanks to her futuristich technology stuff. She has built Rana for have a sister to talk to and Cocorobo for have someone who takes care of the house where Tone Rion and the other girls lives, for the voice she asked Tohaku Itako if she could be her voice provider (Cocorobo and Itako really share the same voice provider!), she acepted and thanks to her Cocorobo met Kyoumachi Seika, her actual girlfriend (Cocorobo’s young aspect is a little sister/ helper for her). Rana sees Uni as a cousin for her similar aspect so she kinda joined the family even if Rana’s natural cousins are Omori Anko and Unity-chan, meanwhile Flower is her best friend. Uni's real cousin is Luka who is Rana's mother figure.