Got the game, but Kokoro Belmont character or music DLC isn't available yet. Oh well, I was at least able to play as Hanafuuma Gesshi, whose inspiration was at least in a Castlevania game (Getsu Fuma).
I'm a bit disappointed at the lack of character profiles from what I can tell. I can't really tell who any of these characters are or what series they are from. I was hoping for some background story in the art book, but alas, no. There at least was a pic of Kokoro in the artbook. It showed a mildly amusing shot of her ending where:
She tangles herself up in a jump rope. (I wonder if the Vampire Killer has a "jump-rope" form in that game, ha.)
I really suck at games like this, but fortunately, there seems to be unlimited continues, so I can just blunder my way through the whole game so that I can at least see all the stages. Probably won't unlock anything cool that way though, oh well.
I guess the BGM Kokoro Belmondo Pack contains a different tune by Michiru Yamane for each level in the game. Once that'll be out, it'll be fun to at least hear some Castlevania music in the background while playing the game. (http://castlevania.wikia.com/wiki/Talk:Otomedius_Excellent (http://castlevania.wikia.com/wiki/Talk:Otomedius_Excellent))