Erwin knows how to speak beautifully, how to persuade and encourage others to do whatever he needs.  And Levi is a man of few words, but completely obeys Erwin, without explaining the reasons. A long-term relationship...Levi's loyalty is commonplace, but he only obeys orders from Erwin Smith.

Erwin, being the commander-in-chief of the Intelligence Corps, often uses his position to be alone with Levi. Once, after persuading Levi to perform at a masquerade ball, Erwin arranged with Ackerman to meet at Erwin's apartment after work to practice dancing. Erwin began to test Levi's flexibility, enjoying the sight and the touch.