Basim Ibn Ishaq is the protagonist of Assassin's Creed Mirage and a major character in Assassin's Creed Valhalla.
Mirage follows Basim in ninth-century Baghdad as he develops from a street thief into a member of the Hidden Ones. The game focuses on stealth, investigation, and assassination in a relatively compact version of the Abbasid capital, reflecting the structure of earlier series entries.
Basim first appears in Valhalla as an experienced Hidden One who becomes involved with Eivor and the Viking settlement in England. Mirage serves as a prequel to those events, showing his earlier life and his relationship with his mentor, Roshan.
The character's identity is tied to the series' science-fiction mythology as well as its historical setting. That mythology can make Basim's story difficult to separate from ordinary historical events. Mirage, however, clearly identifies him as its central playable character and places his formative years in Baghdad.