So Mirai and RIko are a duo that met when Mirai saw Riko fall out of the sky in the middle of the night. The next morning Mirai finds Riko who accidentally reveals herself to be a witch. Mirai is very exicted about this. A series of events lead up to them becoming Precures. So now they have to work together to defeat he Dark Magicians. Over the course of the series, they grow inseparable. They raise a baby fairy named Ha-Chan who sees them as her mom, and they actually kiss in the Manga.