He studied tirelessly to become an Auror, becoming a model student, but afterwards he joined the Death Eaters during the outbreak of the First Wizarding War. However, he proved to be a double agent for Rufus Scrimegeour, making him personally responsible for multiple arrests and defeats of Death Eaters throughout the war. Revealed to be an Auror under Scrimegeour, Rience defected and joined the Order of the Phoenix, where he fought with extreme passion and determination. At some point, he met Sarella Henson and married her, but kept his marriage a secret due to him being a much-wanted man for Death Eaters - he protected her identity for most of the war, but after its close they officiated their marriage.