I feel like, realistically, Setsuna, Haruka, and Michiru (the later of whom are teens if we take canon at its word) would be a huge mess, with the “division” something like
-Setsuna has had zero interaction with people in general for who knows how many thousand years, her one point of reference for children is ChibiUsa and she is secretly devastated when Hotaru doesn’t respond with the same affection over songs and stories.
-Haruka is constantly two steps behind Hotaru’s rapid and erratic aging, she tries so hard but Hotaru is now the equivalent of eight and does not want to watch Sesame Street with Papa. Haruka is outwardly devastated. But she tries to be ~the cool parent~ still and offers pizza and candy for dinner. Or anything Hotaru likes, she’ll learn to cook it JUST PLEASE LOVE HER.
-Michiru is calling in a nanny, and also funding the whole enterprise. Tragically, she’s the one Hotaru shows the most affection for.
SittingOverHereDreaming 