 After the events of "Soulcalibur IV", Algol had been working to corrupt the world with energies from Astral Chaos in order to control it.His actions had caused much disturbance of the world, with Edge Master even entering Astral Chaos to prevent him.Character designer Hideo Yoshie described Algol as "a character that obviously proves the setting of being the strongest character ever in the "Soulcalibur" series".