In Assassin's Creed Unity, what is the name of Arno Dorian's childhood friend and love interest?

In Assassin's Creed Unity, Arno Dorian's childhood friend and love interest is Élise de la Serre.

Élise is the daughter of François de la Serre, the Grand Master of the French Templars. Arno is raised in the de la Serre household after becoming an orphan, which establishes the long personal connection between the two characters.

Their relationship is complicated by the divide between Assassin and Templar traditions. After François is murdered, Arno joins the Assassin Brotherhood while Élise pursues her own Templar objectives and searches for answers.

Élise is not a minor historical cameo: she is a fictional central character whose choices directly affect the plot. Unity places this relationship against the social and political upheaval of revolutionary Paris.