Roberuga is a fictional kaiju from the tokusatsu series Ultraman Mebius. It appears as a hostile monster rather than a human character, so it does not have a conventional first and last name. In the series, Roberuga serves as one of the many episodic threats that Ultraman Mebius and the defense team must confront. Its role is to create conflict, showcase the danger posed by invading monsters, and highlight the heroism and teamwork of the protagonists during battle.