From the official site:
Joshua (Rock Name - Emperor)
Joshua has taken part in the School Chapel Choir and played the trumpet. Before Rock School, he enjoyed listening to soundtracks from The Lord of the Rings and classical music - now his musical interest extends to Motorhead. Gene Simmons taught him a lot about Rock and although he doesn't approve of his morals, at least he now has an introduction to Rock, has gained more confidence, and has more tolerance of loud music!