I am back again following Assassin's Creed Origins with its sequel, Assassin's Creed Odyssey, a title actually set earlier in the game series' universe. From Ancient Egypt we are now in Ancient Greece, following the life of one of two exiled Spartan mercenaries, Kassandra or Alexios. The choice of which you play as is a permanent one, without starting a new game. There are multiple save slots though, so you can play as both without losing your progress with the other. As it has been stated Kassandra is the canon character, she is who I have been playing as. Quickly starting an Alexios playthrough, and seeing something written about the two characters, it seems their stories are reflections of each other, so you should not miss anything too substantive by choosing one over the other.