Reiner is Hajime Isayama's favorite character because he suffers the most, and the character truly represents both sides of Marley and Eldia.
Some aspects of Levi's design and personality are based on the character Rorschach from Watchmen.
Reiner Braun's Titan form was inspired by the body of former UFC heavyweight champion and professional wrestler Brock Lesnar.
The artists modeled Eren's Titan physique on professional MMA fighter Yushin Okami.
Levi stands about 1.60 cm tall and is the shortest adult male character to date.
In the anime, the character Hange Zoe is voiced by a woman. In the manga, however, Hange's gender is unknown to the reader. The reason is that author Hajime Isayama felt Hange's gender was not important to the story and left it to the reader's decision.
Isayama has stated that one of the reasons he chose the name 'Eren' for the character was that it sounds feminine, which makes it easier to remember.
Annie often makes sounds like 'vjj' while sleeping. This is because she dreams of memories from her early infancy in Marley, when she practiced by kicking trees.
Levi's mother, Kuchel Ackerman, was a prostitute in the underground city. When she became pregnant by a client, she decided to raise Levi. But Kuchel died of an illness caused by a client. So Kuchel's brother, Kenny Ackerman, raised Levi and kept their relationship secret. Levi's father is unknown; there is even a chance his father did not know he was a father.
The character Moses's name was changed from Braun, most likely to avoid confusion since Braun is Reinier's surname.
Yelena is the tallest character in the Survey Corps; her height (202 cm) surpasses Jean (190 cm) and Eren (183 cm).
In an interview, Hajime Isayama joked about the character Armin Arlert, saying Armin is a girl.
The oldest Titan is Ymir. Little is known about her past or where she came from. Her birthday is February 17, and she is potentially over 60 years old. She has recounted that she transformed into a Titan and wandered for more than 60 years before arriving at Paradis, which makes her the oldest member of the Corps.
Jean is artist Hajime Isayama's favorite character.
Eren Jaeger's voice actor (Yuki Kaji) also voices popular anime heroes Issei Hyoudou from Highschool DxD, Melodias from The Seven Deadly Sins, and Shoto Todoroki from My Hero Academia.
In the original Japanese manga and anime production notes, Hajime Isayama (creator) wanted Hange Zoë's gender to remain ambiguous. The voice actors were instructed to play the character without leaning too far toward male or female traits.
The Titans' fighting styles are based on real MMA fighters. Eren's Titan form is modeled on Yushin Okami, while the Armored Titan's fighting style is directly inspired by Brock Lesnar.
Despite his youthful appearance, the production team confirmed that Levi is actually in his mid-30s. Keeping his height short was a nod to Astro Boy, because Isayama wanted a 'small but strongest' character.
Isayama explained that Gabi Braun's design and personality are based on a drawing he made as a 'female version of Eren Yeager.'
Eren Jaeger's English voice actor, Bryce Papenbrook, also voices Kazuto (Kirito) from Sword Art Online. Japanese voice actor Yuki Kaji, in addition to Eren, also voices Finnian from Kuroshitsuji.
When asked who Mikasa would end up with at the end of Attack on Titan, voice actress Trina Nishimura gave this answer: 'Historia. Surprising, but it makes sense because both characters are similar and have been through a lot.'