Which Assassin's Creed game introduced the modern protagonist Layla Hassan?

Assassin's Creed Origins introduced the modern-day protagonist Layla Hassan.

Layla is an Abstergo Industries researcher who uses a modified Animus to explore the memories of people from the past. Her story forms the modern-day framework around Bayek's adventures in ancient Egypt, and she later returns in Assassin's Creed Odyssey and Assassin's Creed Valhalla.

Origins marked a major shift for the series. Instead of presenting the modern sections mainly through an unnamed employee, the game gives Layla a continuing identity, personal motivations, and a larger role in the ongoing conflict between the Assassin and Templar traditions.

Layla is sometimes confused with Desmond Miles, the central modern protagonist of the first five main games. She is also distinct from Kassandra and Eivor, who are historical protagonists in later titles. Origins is the specific game that first establishes Layla as a named playable-era character.