Gambler wrote...
It appears that Rosario+Vampire Capu 2 is still keeping up with its fanservice themes from the first season. :D
Since I have yet to read the manga, I am not sure if the various characters' mothers play an important part in the storyline. Perhaps they are just making guest appearances?
Mizore's mom is the only one to show up in the manga, be it first or second "season".
So I call "filler" on this. Of course, the whole series is just one long, long, long stream of fillers. -_-