There's something going around that Ariel was the only Princess to never wear hair accessories. That's wrong, as evidenced here, and that she had to keep her hair back while on the surface. Pocahontas, in the other hand, never wore hair accessories.
Pluto I trained under the Disney Design Group to learn to draw the Disney characters accurately and on-model. I also taught these characters in drawing classes in the Disney parks. Pencil (Need To Try Design Studios)