I adore Pretear, and you must, must get your hands on the manga. It goes in a completely different direction compared to the anime, and it's just as wonderful and even is, sometimes, I think, much scarier and threatening than the anime.

My favourite character is Sasame. XD But I love Himeko. ♥

I know of very little Pretear stuff, sadly. The only thing I ever did was write an essay on Sasame, and I remember realising that there was literally nothing to rec at the time. But that was over a year ago, so there should be something floating around somewhere.