|Alternative name(s):||Eruri, Erwin Smith/Levi Ackerman|
|Fandom:||Attack on Titan|
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The Attack on Titan side story, Attack on Titan: No Regrets, focuses on Levi's origins, revealing that he was part of a band of thieves using the Vertical Maneuvering Equipment to commit crimes before he is scouted by Erwin to join the army. It is shown that Levi once intended to kill Erwin to gain citizenship on the surface. However, Levi later chose to instead follow Erwin and work with him to serve humanity. Over time Erwin earned Levi's trust and subservience.
During the events of the main story, Erwin Smith is Commander of the Survey Corps and Levi is leader of the Survey Corps Special Operations Squad, also known as Squad Levi.
Many fans have noticed that the relationship between Erwin and Levi is unique, based on deep trust and respect. Also, they have a longer history together so they have a strong personal bond. Levi did always follow Erwin around, especially in the anime (like in season 1, episode 22) and after Erwin’s death he did claim that it was his personal feelings which led to his decision.
Big Guy, Little Guy: Any relationship involving Levi typically has some aspects involving his short stature. In one of Isayama's interviews he was asked about Levi's preferred type of person and answered: "A type of woman he likes? Since he’s short, small people tends to like tall people… I guess he might like tall people.” Since Erwin was one of the tallest in the series it is probable that Levi took a liking toward Erwin. This relates to the Height Rule.
There was a shipping war between fans of two Levi Ackerman ships: Levi/Eren Yeager and Levi/Erwin Smith. An aspect of the ship war is that Eren/Levi is a ship involving a teenage boy with a man over twice his age. Levi/Erwin is argued as an alternative.