Eren Jaeger is a former member of the Scout Regiment and the main protagonist of Attack on Titan. He is the only son of Grisha and Carla Jaeger, the younger paternal half brother of Zeke Jaeger, and the current holder of the Attack Titan, Founding Titan, and the War Hammer Titan.
Mikasa Ackermann is one of the two deuteragonists of the series. She is the last descendant of the Shogun clan that stayed on Paradis Island, thereby related to the Azumabito family, and holds significant political power in Hizuru.
Armin Arlelt is a soldier in the Scout Regiment. He is also a childhood friend of Eren Jaeger and Mikasa Ackermann, and is one of the two deuteragonists of the series. his high intelligence and strategic genius makes him an invaluable asset. After the battle of Shiganshina District, he took the power of the Titans from Bertholdt Hoover and became the Colossal Titan.
Levi Ackermann , often formally referred to as Captain Levi , is the squad captain of the Special Operations Squad within the Scout Regiment, and is said to be humanity's strongest soldier.
Erwin Smith was the 13th commander of the Scout Regiment. Discerning, intelligent, and widely respected, Erwin was an able commander. Erwin developed the Long-Distance Enemy Scouting Formation. Due to uncertainty about his future, he later named Hange Zoë as his successor.
Hange Zoë is the 14th and current Commander of the Scout Regiment, formerly a section commander in charge of the Fourth Squad, until the death of Erwin Smith who named Hange as his successor shortly before. Hange conducts research on Titans to the point of being obsessed with them. As a result, they are deeply interested in Eren Jaeger and his ability to transform into a Titan.
Reiner Braun is the Eldian Vice Chief of the Warriors and the main protagonist of Attack on Titan from the Marleyan perspective. He is the illegitimate son of an Eldian mother and a Marleyan father who grew up in Liberio's internment zone. Eventually, he was selected as a child to become one of Marley's Warriors. From a young age, he inherited the power of the Armored Titan.
Bertholdt Hoover was an Eldian who was part of Marley's Warrior Unit. He originated from the Liberio internment zone and possessed the ability to transform into the Colossal Titan, making him one of the greatest threats to humanity within the walls. In the year 845, he infiltrated Paradis Island alongside Reiner Braun, Annie Leonhart, and Marcel Galliard as part of an operation to reclaim the Founding Titan.
Annie Leonhart is a graduate of the 104th Cadet Corps and former member of the Military Police Regiment. Her exceptional skill with swords and unarmed combat earned her the 4th rank, but she is noted to be a lone wolf that struggles to work with others.
Zeke Jaeger is the former War Chief of Marley's Warriors, assigned to take the Founding Titan from the Eldians of Paradis Island. He is the current holder of the Beast Titan . He manipulated and deceived both sides of the war between Eldia and Marley in order to achieve his own agenda of causing the extinction of his own people, which he views as "salvation."
Ymirwas a graduate of the 104th Cadet Corps and a former member of the Scout Regiment. She also had the ability to transform into the Jaw Titan, and had knowledge about the true nature of Titans and the history of the world outside the Walls.
Sasha Braus was a member of the Scout Regiment and one of the few former members of the 104th Cadet Corps, of which she was ranked 9th out of the top 10. A compulsive food hoarder with an overly polite way of speech, Sasha originated from Dauper, a village in the southern territory of Wall Rose.