User blog comment:Master Sima Yi/Assassinews 03-12-'14 — New Assassin's Creed in Victorian London leaked/@comment-173.189.47.87-20141228220746/@comment-173.189.47.87-20150103091530

That doesn't mean they have to stick with Desmond every time if you play his ancestor. Look at AC4BF. Different modern Protagonist, but still plays as Desmond's Ancestor.