Remika Tachibana as SUPER SONIKO

Remika Tachibana cosplaying as SUPER SONIKO.

Super Soniko is a creation of the Nitroplus Company and the mascot for the Nitro Super Sonic music festival each and every year.

Super Soniko was created by the Nitroplus Company in 2007 to be the mascot for their yearly Nitro Super Sonico Music Festival held in Japan each year. Since her creation, she has become quite popular and has even starred in her own video game: Communicating with Sonico. Via Anime Vice