Exams are over, so this is the first picture after the exams...
I was sitting for 5h on the picture - so now I'm whacked
For me the background of this picture is like: Levi killed a titan (or a human?!
)and thinks of his sqad...So the gray-part is in his mind. But I'm also happy when your have other interpretations
Colored with water colours and some copics.