Lord Irus was a Human male Sith Lord who was born on Iego as Castial. When he was young, his family crashed on Iego and became stranded their. Castial lost his legs in a close encounter with a Maelibus, forcing him to rely on his family for food and water. Castial found his savior when the Sith Lord Haeresis came to Iego with his apprentice Priden trying to discover the secrets to Iego’s seeming resistance to age and hunger, only to come across the Castial, who Haeresis determined as Force-sensitive.