Levi Ackerman

Levi Ackerman (リヴァイ・アッカーマン Rivai Akkāman?, often incorrectly romanized as Rivaille) is a leading soldier in the Survey Corps, and is said to be humanity's strongest soldier. He is also the leader of the Special Operations Squad and is often referred to as Captain Levi (リヴァイ兵長 Rivai Heichō?).

I don't know... I never have. I can believe in my own abilities or the choices of companions I trust. But no one ever knows how it will turn out.

Appearance:

Levi has short, straight black hair styled in an undercut, as well as narrow, intimidating grey/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 3DMG usage. He is usually either frowning or expressionless; that, plus his extremely calm demeanour, often makes it difficult to guess what he is thinking.
He is most often seen in his Survey Corps uniform, with a white button up shirt underneath along with his trademark white cravat. When embarking on expeditions outside the Walls, he also wears the Survey Corps' green hooded cloak. When forced to take leave from his duties due to injury, Levi was seen in a black suit, plain white shirt, cravat, and dress shoes. However, since the beginning of the The Uprising arc, he has left the cravat off. For most of the arc, as the Survey Corps were on the run from the rest of the military and the monarchy, he simply wore his 3DMG harness over casual clothes.

History:
Levi is the son of Kuchel Ackerman, a prostitute who worked in the Underground. One day, Kenny Ackerman, Kuchel's older brother, comes to the city to see her; only to find that she is dead. There he finds a young and squalid Levi sitting in front of his mother's bed. Kenny decides to take care of him, but he does not consider himself a good father, so he raise Levi as he could: teaching him knife skills, how to get along with people, and violent behavior. Levi also learned to use his own power that he unknowingly obtained from being in the Ackerman clan. The time passed and Kenny Ackerman ended up teaching Levi everything he knows. One day, in the subterranean city, Levi started a fight which he won easily. On that moment, Kenny decided to leave him behind, as he had made sure that he and Levi were not going to have a pathetic death like Kuchel.
Main article: Attack on Titan: No Regrets

Some time after Kenny left, Levi lived the life of a thug in the underground city below the Capitol, along with his friend Farlan Church. Later, they were joined by Isabel Magnolia. The three somehow stole and trained themselves to use 3DMG Gear, using it to commit various crimes to make money and save up to get citizenship on the surface. However, during one such job, they were captured by Erwin Smith, Mike Zacharius, and several of their subordinates, after which Erwin blackmailed the "Thug Trio" into joining the Survey Corps. While Farlan and Isabel died on their first expedition, Levi went on to become "Humanity's Strongest Soldier" and head of the Special Operation's Squad.