Cosmo Ruru (小宙るる) is a female Virtual YouTuber who makes content in Japanese. She's the princess from the planet R'lyeh. Cosmo often does whatever her viewers ask of her. Her channel was created on 31 July 2018. Her twitter account was created in the same month. Cosmo debuted on 6 August 2018. On 6 August 2019, Cosmo celebrated her first anniversary.