Greetings lovely lady! What a creative, diminutive twist on your "original" name, Ringoletta! How is it we humans are so often "fooled!?" But it's easy to see, you're all girl and quite the fetching feline at that! I hear you're plaqued by the curse of the "evil sister!?!" lol Well, you're not the first to have to deal with an ornery sibling! But I like your plan of attack Ringoletto...kill them with kindness and as has been said, "discretion is the better part of valor."
What a lucky family to have been blessed with such a sweet and gentle furkid, the Cat Who Came for Christmas and now lives eternally in the hearts of her loving family! Enjoy your much deserved hour in the Cat of the Day spotlight with your Mom and Dad, devoted young skin sister and fursib, too! I'm sure even your "evil sister" will be on her best behavior, deferring to the reigning Kitty Queen of Pet Talk! Cuddles and kisses to you, beautiful Ringoletto!
P.S...Have you tried Pilates?