Which Assassin's Creed protagonist is known as the Mentor of the Hidden Ones?

Bayek of Siwa is known as a Mentor of the Hidden Ones.

Bayek is the central protagonist of Assassin's Creed Origins, set in Ptolemaic Egypt. Together with Aya, he helps establish the Hidden Ones, the organization that later develops into the Assassin Brotherhood. Bayek's title and role connect the game's ancient setting to the institution seen in later historical periods.

The Hidden Ones are formed after Bayek and Aya confront the Order of the Ancients, a secret organization pursuing power through political influence and violence. Their creed, methods, and hidden identity provide an early foundation for the later Assassins.

Altaïr, Ezio, and Eivor belong to different periods and traditions. Altaïr is a Levantine Assassin, Ezio is a Renaissance Italian Assassin, and Eivor is a Viking warrior allied with the Hidden Ones. The specific Mentor association in Origins belongs to Bayek.