Levi Ackerman

As a result of his early childhood years, 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 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.

In his pre-Survey Corps criminal life, when he lived in the Underground City, Levi refused to take orders from anyone (as Petra Ral tells Eren), though he placed a great trust in his comrades, something he would later do with his subordinates. However, after he joined the Survey Corps, he came to greatly respect Commander Erwin Smith, whose orders he follows willingly because he trusts in Erwin's vision for the Corps.

Although he rarely shows it, Levi has a strong 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.

Levi operates rather independently. Many of his Titan kills are solo, accomplished with little direct cooperation from other soldiers (due to him usually assigning them to hunt other Titans in the vicinity). Although he is looked up to by many, and he does not hesitate to give orders when necessary