Siblings, Rescue, Eiji Leaves
Ankh is absorbed into a single body, but the two halves are still not completely whole; Eiji begins to wonder about his place in the Izumi family's life as Shingo tries to help him out in Ankh's place; Gotou helps Eiji on his mission to rescue Ankh, but Eiji is stopped by Dr. Maki.
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More from this season
S21 E1
Medal, Underwear, Mysterious Arm
A mysterious arm reawakens the Greeed from their slumber and decides to use Eiji Hino, a cheerful wanderer, as his means of getting back what he desires as Kamen Rider OOO.
S21 E2
Greed, Ice Candy, Present
Ankh explains the Greeed and the purpose of the Medals to Eiji, even as the human desires to merely use his new power to fight for good instead of for selfish needs.
S21 E3
Cat, Evolution, A Glutton
Ankh becomes troubled when Eiji prevents him from eliminating his possessed body's sister while another Greeed uses a man's gluttony to create more Medals.
S21 E4
Doubt, Photo E-mail, Saving Hand
Ankh threatens to leave OOO for Kazari and the Greeed while investigating the evolution of humanity while Eiji tries to find more about Hina.