Tiara is a character introduced in the game Super Mario Odyssey. She is forced into helping Bowser and becomes Princess Peach's wedding tiara, which was the reason she was wearing a tiara instead of her usual crown. She is also the younger sister of Cappy, Mario's new ally.
Tiara's default form is a beautiful large white and silver tiara with magenta eyes. Under the hat, she has a small spectral body similar to a Boo. Tiara can take the form of different hats, including Peach's Tiara. Her large eyes appear in all of her appearances.