A certain ten-year-old boy has never seen the outside world. His name is Eren Yeager. Eren feels uncomfortable surrounded by people who have given up going outside of the walls for the transient peace that they are currently enjoying. Eren refers to them as livestock while they refer to him as an outsider.

However, one day that all changes when a Giant Titan appears suddenly smashing to pieces both Eren’s ‘dream’ and society’s ‘peace...’

After defeating the Armored Titan (Reiner), the Colossus Titan (Bertolt), and the Beast Titan (Zeke), Eren and the other humans within the wall have succeeded in retrieving Wall Maria and in eliminating the titans outside the wall. Also, the titans are found out to be the people of Eldian, who is the same race as the people in the wall, being changed by the people of Marley.

Four years has passed after the incident. The war with the Middle East Alliance, which Marley has started after the failure of retrieval of "original titan" by Reiner and the others, has ended.
Zeke, who leads Eldian army, recommends again to the headquarter of the army for retrieval of "original titan", under the reason of making the rule by the titan power the absolute.
Reiner meets Falco's old friend, Kruger, but...

Eren Yeager

Voice Actor: Yuki Kaji

Eren is a boy who dreams of the world beyond the walls that they live in. After joining the Survey Corps, he has only one goal; to be assigned to venture outside of the wall with the Survey Corps. He has a very strong personality, however he is obscenely reckless. Has gained the powers of the "Attack Titan" and the "Founding Titan" from his father. He finally finds the ocean, but begins to think about new enemy overseas.

Mikasa Ackerman

Voice Actor: Yui Ishikawa

Ever since her fate was intertwined with Eren’s many many years ago, they have been living together. She prioritizes Eren’s safety over everything else, and she wears the scarf that she received from Eren almost constantly year-round.

Armin Arlert

Voice Actor: Maria Inoue

Armin is the childhood friend of Eren and Mikasa. He has extensive knowledge and is the one who taught Eren about the world outside of the wall. He has no actual power, and is actually a coward who laments himself. He received his name from his father. He was near-death at the retake of the Wall Maria for playing decoy, but revives by devouring Bertolt and inheriting the power of the "Colossus Titan."

Levi Ackerman

Voice Actor: Hiroshi Kamiya

Levi is the Captain of the Survey Corps. He is viewed as the most powerful human on earth. His comrades and subordinates call him “Heichou” or Lance Corporal.

Hanji Zoe

Voice Actor: Romi Park

She has supported the defeat of the Armored Titan at the Retake of the Wall Maria although she has injured her left eye from the blast of the Colossus Titan. She become the commander of the survery corps after the death of Erwin.

Zeke Yeager

Voice Actor: Takehito Koyasu

Owns the power of the "Beast Titan", and has worked on the Retaking of the Founding Titan together with Reiner, Bertolt, and Annie. He fights the Survey Corps close to elimination at the retake of the Wall Maria, but manages to escape after being severely injured by Revi with the power of the Quadrupedal Titan (Cart Titan). He is obedient to Marley, in contrast to his father, who is the same Eldian who wished for the reconstruction of Eldian. He is a stepbrother of Eren.

Reiner Braun

Voice Actor: Yoshimasa Hosoya

Is the colleague of Eren and Misaka, but actually the "Armored Titan" who broke the wall. He has succeeded to escape at the retake of the Wall Maria together with Zeke. He later participates in the war with the Middle East Alliance.