Simon Belmont played a big role in Nintendo’s past, present, and will undoubtedly play a role in its future. The whip toting hero and his spawn/relatives/anime cousins have made appearances on the NES, SNES, Game Boy, and so on, all the way to the current iteration on Nintendo DS.
But did you know Simon and friends made appearances on the Amiga and the X68000? How about the PC PC Engine, where Lawrence from NFG Games (he wrote a book about sprites) said Castlevania “really hit its stride?” If you’re really interested, you can check out his book on character design for mobile devices. Or take a nap.