Opalescence

Opalescence, or Opal for short, is a white, stubby Persian cat and the pet of Rarity. Opal is usually depicted as a typical Persian cat, being somewhat lazy, prideful and reserved. Unlike the other pets, Opal is often shown to despise Rarity due to the unicorn often pushing her around or getting her in the line of fire during accidents or Rarity's mental breakdowns. She is, however, often shown to have a good relationship with Fluttershy. She sometimes serves as Rarity's conscience, hinting things for her like in the episode Sweet and Elite, where she is shown constantly trying to remind Rarity of finishing Twilight's dress. Other times, Rarity is shown to have one-sided conversations with the cat, talking or ranting to help maintain her line of thought.