Princess Cadance is an alicorn pony who is first featured in the season two finale alongside her husband Shining Armor (after the season two finale). Her debut episode gives her proper title as Princess Mi Amore Cadenza. She is Twilight Sparkle's former foal-sitter and sister-in-law (after marrying Shining Armor in A Canterlot Wedding - Part 2). "Castle" proclaims her as "The Crystal Princess!" at the end of The Crystal Empire - Part 2, and a blurb on one of the toy sets featuring Cadance says that she and Shining Armor "lead the Crystal Empire together!" Various promotional materials, including a New York Times ad, A Canterlot Wedding - Part 1's Hubworld, iTunes and Netflix summaries, the back cover of the DVD Royal Pony Wedding, and the home page of Treehouse TV's Royal Wedding Contest site, state that she is the niece of Princess Celestia, and the chapter book Twilight Sparkle and the Crystal Heart Spell specifies that Celestia adopted her as a niece.