Sebastian Y. DeMarino, better known by his stage name SEBii, is a Shanghain… Read Full Bio ↴Sebastian Y. DeMarino, better known by his stage name SEBii, is a Shanghainese-American artist/producer born and raised in Shanghai, China, since the age of 17, only to move to the United States for college. He’s commonly known for his track “Butterfly Bankai” which blew up off of the “デーモンAstari” YouTube Channel. He is also known for the Play Poker Remix with producer Maple. SEBii is a member of the Neilaworld collective.