The mascot character of "NITRO SUPER SONIC", annual live events held by the company Nitroplus. She made her debut in 2006 and she was designed by Tsuji Santa. She is the vocalist & guitarist of the band "Daiichi Uchuu Sokudo" (第一宇宙速度, First Cosmic Velocity) and the other members are bassist Fujimi Suzu and drummer Watanuki Fuuri.
Sonico is rather shy and clumsy, but nevertheless kind, bubbly, energetic and positive no matter what. Her usual (and most known) outfit consist of a casual blouse with a cat printed on it, as well as a blue hoodie, and a fur-trimmed miniskirt. She is never seen without her trademark headphones. While her physical features depend on the artist, she is consistently depicted with large, droopy red eyes, light pink hair and very large breasts.
Her height is 158cm, and her measurements are 90F-57-87. Her birthday is October 14th.
On June 30th, 2018, Sonico announced her debut as a virtual youtuber, which lasted until January 2020. Her redesign consists of a pink and white letterman jacket, her trademark cat blouse or a camisole (depending on what kind of straps are on her shoulders), a black pleated miniskirt, a pair of black legwear thighhighs, and a pair of black lace-up high heel boots.