The Bonneters are a race of ghostly hat-like beings found in the region of Bonneton within the Cap Kingdom of Super Mario Odyssey. They all have Eerie-like bodies, heads shaped like hats, and big eyes with irises of various colors. As demonstrated by Cappy, they can also take on the appearances of other hats, such as the Mario Cap, and capture other beings, both animate or inanimate. Male Bonneters have top hat-shaped heads with a more pronounced eyebrow ridge while female Bonneters have cloche hat-shaped heads with ribbons and wingtip eyelashes. Cappy and his sister, Tiara, are shaped like a white top hat and a tiara, respectively.
Male Bonneters also play a role in the Hat-and-Seek Power Moon missions recurring throughout different kingdoms, in which Mario must find the Bonneter hiding on an NPC's head in the kingdom.
Like many of the supporting characters, Bonneters will cower and refuse to talk to Mario if an enemy gets too close to them, regardless of whether Mario has captured the enemy in question or not.
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