omochao
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A recurring character in the Sonic the Hedgehog series, first appearing in Sonic Adventure 2. A robotic Chao with a propeller on his head and a wind-up key on his back. Omochao usually appears as an in-game guide, giving hints to the playable characters during gameplay. He is often seen as an annoyance by most players, regardless. His name comes from 'omocha', the word for 'toy'.