Simon Thaddeus Reginald Marks is a British Whitelighter-Witch from the Marks line of witches, a self-described "noble and very powerful witch family". The Marks family worked closely with Melinda Warren during the Salem Witch trials. According to his family's scroll, Simon sought out oracles and soothsayers to help him find his destiny and place in the world. This led him to Halliwell Manor in San Francisco to the foot of Paige Matthews.