Marie Dorian was the Austrian wife of the French Assassin Charles Dorian, and the mother of Arno Dorian. Marie left her family when Arno was still a child, after discovering her husband's ties to the Assassin Brotherhood. She is an ancestor of Callum Lynch.
In 1789, while under the influence of psychotropic drugs – as part of an initiation to the Assassins – Arno saw many visions, including that of his parents during his birth.
In a letter, after the death of Charles Dorian, Arno stated that his father was in Heaven with his mother. It was never explained if Marie died after she left her husband or if Charles lied to Arno to hide the reason of his mother departure.