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Otomachi Una is a Japanese VOCALOID developed and distributed by Internet Co., Ltd. in collaboration with MTK Inc., and was released for the VOCALOID4 engine.
She is a young girl with long blue hair in twintails, long bangs and an ahoge. She has blue eyes and a fanged smile.
With the release of this character came three designs, two for the VOCALOID voicebank "SUGAR" and "SPICY", and another for TalkEX (a text-to-speech program). The SUGAR illustration features Una in a band uniform with a sailor collar and red necktie and a white pleated skirt. She wears white socks and blue shoes. Around her left thigh is a gold thighlet; this matches her gold bracer.
SPICY is altered to be more punk in theme. Consisting of a black jacket, red tie, and white shirt that shows her navel. There are belts, a single fishnet legwear paired with a pink legwear and black shoes.
The TalkEX illustration features Una in a dress with a sailor collar, plaid black pantyhose and white sneakers. Her accessories are red-framed eyewear and a wristwatch. This design was also reused for her later VOICEROID voicebank.
All three looks have her wearing a puffy eel hat.