Attack on Titan takes place in a world where the remnants of humanity live inside a series of connected cities, isolated by enormous walls. These walls exists to keep the Titans out, gigantic humanoid creatures who devour humans seemingly without reason. These Titans have reduced the world’s population to staggeringly low numbers. The 3 main protagonists of Isayama’s manga are Eren Jaeger, his adoptive sister Mikasa Ackerman, and their friend Armin Arlert. Their lives are changed forever when a “Colossal Titan” breaches the wall protecting their town, leading to thee death of Eren’s mother. Vowing revenge and to reclaim the world from the Titans, Eren, Mikasa and Armin join the Survey Corps, an elite group of soldiers who fight Titans outside the walls. Haruma Miura plays Eren. Kiko Mizuhara is Mikasa. Kanata Hongo will play Armin. Satomi Ishihara portrays Hanji. Nanami Sakuraba is Sasha. Takahiro Miura is Jean.