Saizou (サイゾウ Saizō) is NinjaBlue (ニンジャブルー Ninja Burū) of the Kakurangers. He is a descendant of Saizou Kirigakure. His Mighty Morphin' Power Rangers Season 3 counterpart is Billy Cranston, while his Mighty Morphin' Alien Rangers counterpart is Cestro, the Blue Aquitar Ranger.