Rainer Braun

Reiner has short blond hair, gold eyes, and a defined facial structure. His large height, broad shoulders, and serious expression give him an intimidating presence. As a member of the Scout Regiment, he wears the wings of freedom jacket over his standard military uniform, with a green shirt underneath. In casual attire, Reiner wears a dark gray button-down shirt with rolled up sleeves and dark green pants with a brown belt.

As a child, Reiner was rather quiet and meek yet at the same time very loyal and driven. Because of his motivation, Reiner was very desperate to become a Warrior, even going as far as to accuse Porco Galliard of being an Eldian spy when he belittled him. However, after he was chosen to inherit the Armored Titan, Reiner gained a newfound self-confidence, though it was quickly shattered when Marcel revealed that he was not chosen for his abilities. Due to Marley's propaganda and his mother's influence, he believed the Eldians of Paradis Island to be "devils" and that he would become a hero by exterminating them. He was also very gullible, never doubting the words of his mother and superiors. Following Marcel's death, Reiner began incorporating elements from his personality into his own. He became more decisive and assertive, even willing to threaten Annie and Bertholdt to ensure they followed his orders, yet also deeply caring and genuinely desiring to protect them. He also accepted that his belief that his father would return if he were to become a Warrior and defeat the Eldians was just a fantasy. In addition to this, Reiner started to develop a negative perception towards himself, believing he was supposed to have failed in becoming a Warrior and that he should have been the one to die instead of Marcel.By the time he joined the 104th Cadet Corps, Reiner had completely incorporated Marcel's personality into his own. He built up a reputation of being a passionate and honest person with a strong sense of duty who takes his role as a soldier very seriously and encourages others to do the same. However, he was also noted to have a kind heart and a tendency to always think of others before himself, taking on extra burdens for the sake of his comrades. He was stated to be the "big brother" of the other cadets