User blog comment:Master Sima Yi/Assassinews 25-03-'13 — Assassin's Creed IV: Black Flag gameplay trailer/@comment-31.205.65.28-20130328023621/@comment-3046679-20130330163610

What Crimson means is that he plucked two random historical characters and set them in two roles. For all we know, these two would not appear at all in that setting, or would have an allegiances reversed.