In December, we had Belle (at the front for your picture), Cinderella, Snow White, Aurora, & Ariel for breakfast. This was different than the princesses that we had there in 2007 (Mulan and Jasmine instead of Ariel and Cinderella).
JoJo and Goliath were there for our breakfast at H&V in December. Would love to hear if they get switched out. They either need to completely redo all the characters (although we like the Little Einsteins), but a Toy Story character breakfast would be awesome (especially for boys who don't really have anything for them). I wouldn't mind seeing Handy Manny there either. My girls (2.5 & 6) were in awe of him when they took pictures with him!
If your little one loves Belle and Cinderella, don't miss the character meet and greet in ToonTown (assuming they haven't made major changes there yet). They spend a good deal of time with your little ones, talking, signing autographs and taking lots of pictures. It's great. Aurora is there also. The same can be said for Pixie Hollow which is in the same building. But, if you don't want to wait an hour to see the Fairies, get there about 10 minutes before rope drop at 10am and you won't have much of a wait at all. The princesses didn't seem to have long waits at all. We were there in early December, but it was much more crowded than when we were there at the same time in 2007 because free dining was going on. So, I doubt wait times would be a whole lot different for when you are going unless it's a peak time like spring break or Easter
You can catch Ariel in Ariel's Grooto behind the Dumbo ride.
Enjoy your trip!!