Zekana said: i like to think the stronger she gets (power P), the more she can divide her ghost side without it losing power.
i look at it like this: she's known for gathering spirits/ghosts, right? i'm gonna go out on a limb and say that she starts off with Myon, and each option she gets is a ghost/spirit that follows behind her (think: Bohemian Archive in Japanese Red). thats my take on it any way.