There’s a huge buffet restaurant (Makahiki) similar to what you’d expect from Disney (i.e. Chef Mickey’s, Boma, etc).. For breakfast it includes characters and for dinner SOME nights it includes characters but not all.
You stand in line after you check in to meet Mickey (there’s a photopass photographer there), and then 2-3 other characters come to your table once you sit down. It’s usually Minnie, Goofy, and Pluto.
If you’re a frequent Disney traveler, you know the Disney quick service food scene. Ulu Cafe is on par with what you’d expect at a deluxe resort like the Grand Floridian or Polynesian and a little better than theme park food.