The last of us

I love the concept - its simple but really well done. They look like themselves (meaning the way they're drawn in the anime) but the colors are a little darker and the contrast is higher, considering the somewhat 'dark' nature of the drawings, i think it works well. I'm really impressed with the titan side on all of them. That muscle-like appearance can be difficult but it looks great. I only have a few complaints, mostly that Erwins shirt has a lot more creases than I would think it should. I also think his ears are slightly uneven.
I notice that you only seemed to carry out the half-titan thing on their faces necks and (presumably) their chests but then you show both of Levi's arms as human and they each have two clearly human ears which looked weird to me once I noticed it. However, I think its great that the titan side looks slightly different for each of them- The eyes, the teeth, colour and texture are unique to each character and thats really great.
I don't know what to say about the technique. I often chose to draw things digitally to avoid the textures created with the pencil- you can tell the directions that people colour in and it can look really messy, that being said, I can see the hatching and cross hatching that you did so you obviously know what you're doing and maybe that does add to the overall effectiveness of it. I really can't think of anything bad to say thats not a personal opinion so 'technically' its very well done. (: