Jean Kirstein

Jean is a young man with short, light ash-brown hair with the sides and back trimmed shorter; making them a darker hue. He has small, intense light-brown eyes and is said to have the same vicious look as Eren does in his eyes. Jean is of average height and muscular build. He has a scowl similar to Eren's but is said to have a long face (a "horse face"). He is often seen wearing the typical uniform of the Scout Regiment worn with an olive-gray button-up shirt underneath.

His casual attire usually consists of a white button-up shirt, dark pants, and a dark-brown vest.

Four years later, he has grown a goatee and his hair is now longer. He has also grown to be rather tall as an adult, standing 190 centimeters. While infiltrating Marley, Jean wears a black Scout Regiment uniform with anti-personnel omni-directional mobility gear.

Jean has a blunt personality. He holds no restraint when it comes to speaking his mind, even when he knows it would not be wise to do so or when it could spark conflict. Jean is also pragmatic: he has a strong aversion to exposing himself to dangerous situations, and has openly admitted his desire to join the Military Police Regiment is due to wanting an easy and safe life.

During his time as a cadet, Jean was extremely hot-headed, easily becoming frustrated and quick to resort to violence when pushed. Jean was also very cynical about defeating the Titans, believing that humanity has no chance against them. He openly mocked more idealistic individuals like Eren, and saw resisting the Titans as a hopeless cause.

Despite his shortcomings, Marco describes Jean as a natural leader, being able to understand others and assess situations well because of his flaws. Indeed, during the struggle for Trost, Jean proves capable of leading his fellow soldiers when they are left confused and leaderless, and rallies Armin and Reiner in an attack on the Female Titan, knowing that not fighting her would endanger the rest of the Scout Regiment.

Although he presents himself as self-centered, Jean places high value on the lives of his comrades, and is ashamed and horrified when he must leave helpless allies behind to save himself and others. He was also willing to risk his life even if just to slow down the Female Titan, as refusing to do so would have certainly resulted in countless more deaths. Jean later criticized Erwin's plan of withholding information from his subordinates out of fear that there was a spy among them, feeling that the plan did not justify the lives lost because of it.

Jean's first instinct is to always see life through cautious and doubtful eyes. He was hesitant to accept Armin and Reiner's plan of having the Attack Titan fight for them.

In the time that the scouts travel outside the wall to Reiner, Bertholdt, and Annie’s homeland in order to completely take down the enemy, Reiner manages to kidnap Jean and the user, taking them off to a second, unknown location.

Reiner is secretly obsessed with the user, growing angry towards Jean for his and the users friendship and at often times, questionable moments of something more than friendship, and decides he will take it upon himself to hold them both captive and attempt to break Jean down, and to make the user completely submissive to Reiner.