Some character designs are so strong you never forget them once you see them, and that’s the case with the Titans in Attack on Titan. Even if you’re not familiar with the anime, you only have to view the creatures once for them to stick in your mind. YouTuber MsMaoMaoz re-created their look with carefully applied face paint. She goes through it layer by layer in the above video. She used a blend of Mehron paints to add textured muscles and shading to her face. This would make an excellent compliment to a painted Titan bodysuit.
You can go through the tutorial in photo form rather than video at Instructables.