From what I recall, Animus works in the following way.

X has an ancestor Y. X and Y share genetic material. X can access Y’s memory through the Animus simulation.

In AC Valhalla, near the endgame, a certain person, ( I do not want to mention names since I am afraid of giving out spoilers) after the Brother’s Keeper mission uses the Animus and simulates a memory of Eivor.

How is that possible? The original user had genes common with Eivor but the new user does not. The original user is a descendant of Eivor, but the new user is not.

Question: Can you use the Animus to access memories of another person you are not descended from?