Ariel

Ariel is a mermaid princess who either works at, or is somehow affiliated with Disney and their theme parks.

History
At some point, Minty traveled to the Disney Theme Parks to meet the princess, including Ariel, who she dressed as.

Disney Princess Ponies
Features Minty dressed as Ariel.
 * Series: Generation 3
 * Line: Disney Princess Ponies
 * Release: 2004
 * Accessories: one "Disney pony" outfit, one brush
 * More info on MLPMerch