Levi Ackerman

Levi has short, straight black hair styled in an undercut, as well as narrow, intimidating steel blue eyes with dark circles under them and a deceptively youthful face. He is quite short, but his physique is well-developed in musculature from extensive omni-directional mobility gear usage. He is usually either frowning or expressionless; that, plus his extremely calm demeanor, often makes it difficult for others to guess what he is thinking.
He is most often seen in his Scout Regiment uniform, with a light gray button-up shirt underneath along with his trademark white ascot, though since the coup d'etat, he has lef it off. When embarking on expeditions outside the Walls, he also wears the Scout Regiment's green-hooded cloak;

Levi is described as a "clean freak" by those who know him personally, as he prefers his environment and himself to be spotlessly clean. He is averse to having either himself or his equipment soiled, and he has been known to wipe down his blood-smeared blades while still on the battlefield. However, he will not hesitate to touch filth if he deems it necessary.[5]

Despite his preoccupation with cleanliness, Levi is abrasive and not very approachable. He rarely shows emotion, giving a cold impression to others. His manner of speaking tends to be blunt and insulting, his comments are frequently coarse or otherwise inappropriate, and he is not above provoking or belittling those who oppose or irritate him. His sense of humor tends toward the vulgar, insulting, and morbid. All of this makes him unsettling to a great number of people. However, after he joined the Scout Regiment, he came to greatly respect Commander Erwin Smith, whose orders he follows willingly because he believes in Erwin's vision for the Scouts. He also places great trust in his subordinates.

However, Levi's obedience is strictly limited to individuals he respects, and he has no problem showing open disdain for authority from anyone outside of this circle. Although he rarely shows it, Levi does have a sense of morality and empathy. One of his most defining characteristics is the great value he places on preserving human life: this is especially shown when it was revealed that all Titans might have once been human themselves. The thought that he had unknowingly been killing humans all this time disturbs him greatly. He himself has stated that he hates unnecessary casualties, and he tells his subordinates to use their judgment so that they can avoid blunders that may cost them their lives. Because of their hazardous profession and his personal values, he cares greatly for his subordinates' welfare.While Levi shows loyalty and empathy for his comrades, he shows no mercy towards the Titan