I love Hellboy, this is a really good piece I really like it.
I do have a comment about his legs; more muscle tone should be added to his thighs and the right leg (his left) is a bit too thin even if it is moved back. The pelvis needs to be darkened and more folds to the pants.
Also, the right forearm (his left) should be a little smaller.
However, I love how you made his upper body and the stone hand, so badass.