Marcello was the son of a wealthy, but cruel man and one of his maids. His father found that his wife would not bear a child and so had Marcello with his maid. While Marcello was still a boy, his father did manage to have a son with his wife, Angelo. Marcello and his mother were thrown out. Marcello would later join the Abbey after his mother's death, and soon become one it's leading figures.

He despises his half-brother for ruining his life, this isn't helped by the fact that Angelo neglects his duties.