So Shamiko's first training session was at Mikan's family's old factory, and Shamiko's old man was sealed inside a Mikan box. Let's see how all this links up somehow.
I just realised all three Magical girls named after tree's, Peach (In my defence I didn't know Momo is Peach in Japanese.) Mikan, and Sakura. I'm guessing here but they probably also represent the seasons as well, Sakura is Spring, Mikan is Autumn and Peach summer?