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唄音ウタ
An UTAUloid. Her nickname is Defoko (デフォ子, meaning "default child") because she is the default voice data bank for the UTAU program. Her voice is not human based, so it sounds robotic and airy.
She wears a purple beret, and has short plum colored hair that comes close to her shoulders and matches her necktie.
(excerpts from Utau.wikia)