Mordecai de Ardyn is a Maar Sulais knight from the House of Ardyn who is working for the Order of the Black Rose. He served as a bodyguard to his uncle Belial and his half-sister Desdemona. He is a long-time carrier of the Blood Fever, and only his magical armor is keeping him alive although the disease has ravaged his body and made his eyes glow permanently in eerie blue light. He ostensibly became a prisoner of the Totenkopfs after his kidnapping in the Second Battle of Remonton but in fact it was all a ruse as he aided them willingly to distill the Blood Fever from him and mutate it into an even stronger variant. He later moved to Alent where his treachery was uncovered when he tried to assassinate Leon Alcibiates and Marcus Sarillius, but he escaped with help from Totenkopfs.