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. Also known for her curvaceous figure. 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.
On June 30th, 2018, Sonico announced her debut as a virtual youtuber with a new costume design. Her redesign consists of a pink and white letterman jacket, a t-shirt or camisole depending on what kind of straps are on her shoulders, a black pleated miniskirt, a pair of thighhighs, and a pair of black lace-up high heel boots.