Aurelio "Auro" Stein is a 20-years-old warrior whose elemental power is the Sea. He is as serious, shy and smart as his sister Glenda Stein, but he prefers to study physics rather than biology. He reads books, mainly physics books and comics, from his library at home, but he chooses to watch movies rather than news, therefore he waits before the newscast ends to put one of his "cassettes" from his library in the "cassette-player" bought by Auro 13 years before.