Which organization is formed by Bayek and Aya in Assassin's Creed Origins?

Bayek and Aya form the Hidden Ones in Assassin's Creed Origins.

The Hidden Ones emerge after Bayek and Aya confront the Order of the Ancients, a secretive power network influencing Egypt. Their organization is built around resisting oppression and protecting people from rulers and institutions that abuse power.

Origins presents the Hidden Ones as the predecessor of the Assassin Brotherhood seen in later games. The order's philosophy, hidden bases, signature weapon, and use of concealed identities develop during the story, but the familiar name “Assassins” is not yet the organization's official title.

The Order of Ancients is their enemy, not their organization. The Brotherhood of the Ancients is also not the correct name, while the Rooks are Jacob and Evie Frye's gang in Syndicate.