You know sometimes I have a good day and then remember that Levi will eventually forget what his friends looked and sounded like. He won't remember what Hange's voice sounded like as they busted into his office to tell him about a discovery they made. He won't remember what Erwin sounded like when he told him that he trusted him to lead his men into missions. He won't remember how Isabel's and Furlan's laughter sounded like.
Levi will still remember certain features, Hange's big brown eyes, Erwin's blonde hair, Isabel's and Furlan's smile but the rest will be a blur, he will try to find them in strangers, and although I believe that his wounds will heal, he will always torture himself with the thoughts that he should've done more, that they could've been here with him. Instead, he can only be with them in his memories.