Tiara

Tiara is a character appearing in Super Mario Odyssey. She is a creature of the same species as her brother, Cappy, and is kidnapped by Bowser to be used as Princess Peach's headdress in their wedding.

Physical description
Much like Cappy, Tiara's main body resembles that of an Eerie. Similar to her brother's normal form resembling a top hat, Tiara, true to her name, resembles a bridal tiara.