The main playable character of Assassin's Creed Unity is Arno Dorian. He is a French Assassin whose story unfolds in Paris during the French Revolution and its surrounding political turmoil.
Arno is adopted by François de la Serre, the Grand Master of the French Templars. After François is murdered, Arno is blamed and imprisoned. He escapes, joins the Assassin Brotherhood, and investigates the murder while becoming involved with Élise de la Serre, François's biological daughter and a Templar.
Unity emphasizes social stealth, cooperative missions, and a detailed recreation of revolutionary Paris. Its historical backdrop includes the storming of the Bastille in 1789 and the rise of revolutionary factions. Arno is sometimes confused with Élise because both drive the plot and share a complicated relationship, but only Arno is the game's principal playable Assassin.