Arios serves as a guardian linked to the Sacred Beast Cosmos. He perished before the events of the OVA *Angelique: Shiroi Tsubasa no Memoir* but returns under mysterious circumstances intent on killing both queens, Angelique Limoges and Angelique Collet. His resurrection and antagonistic plans drive the central conflict, forcing the combined efforts of fellow guardians to stop him while simultaneously attempting to save him from his destructive path.

Within *Angelique Trois*, Arios becomes a romanceable character accessible only in subsequent playthroughs. Unlocking his route requires naming the protagonist "Arios" during initial setup, receiving a failure message, and then proceeding with a normal name. He appears exclusively at the "Promised Land" location on Tuesdays and Thursdays at noon. His romantic storyline mirrors other routes but incorporates elements from his *Tenkuu no Requiem* iteration.

For *Angelique: Twin Collection*, Arios features in Volume 5 alongside Clavis. Each volume pairs two characters, combining music videos with segments of an ongoing eight-part animated drama. His physical description includes grey hair, multicolored eyes, a height of 1.87 meters, weight of 72 kilograms, and AB blood type.