[Huh?! Why does he have to explain this?! He doesn't even use a Persona!!

If the situation was just a little less serious, he would be gaping at Kotone, because what, but instead he takes in a low breath and holds it, just so that he can get his thoughts in order. Okay, so he kind of knows about Persona stuff, mostly because of said girlfriend that's tossing all this work on him. Geez, it's a good thing he really loves her!!]

There are multiple Personas-- spirits inside Kotone. They're all representations of her soul, proof of her connections with others. She has full control over them. [Usually.]