Not really something I personally didn't notice, but. Marisa now has seven original themes. Nine, and possibly ten if you count arranges.
Love-Colored Magic
Dim. Dream
Vessel of Stars ~ Casket of Star
The Witches' Ball ~ Magus
Oriental Dark Flight
Magician's Melancholy
Magus Night
(I believe Magician's Melancholy to be about Marisa, and I'm counting it as one of her themes. GoM is entirely from Marisa's point of view, and the fact that there were only two tracks, one original, depicting a magician... I can't just view it as a random track such stuff from R53M. Same goes for Sputnik Genya, although it's an arrange and doesn't seem to be particularly about Marisa, save for sounding like something she would have as a theme.)