John Herbert

He appears to be the same ethnicity of Swordsman in AC5 and Keith in AC3. Slash's planes differ from Edge's in that Slash has better attacker aircraft. While not appearing again in the storyline, he joins Ouroboros in AC3 according to a newscast. A person with the same name appears in AC04, partrolling over Stonehenge; it is quite likely that they are the same person. A crew member of the Arkbird is also named John Harverd.