Hes really going through a late adolescence, Harbour tells EW.

Its the fundamental paradox: How are you feeling today, my serial killer of your fellow beings?

Like wait, you want me to be this brutal machine but then you care how I feel?

Those forces of darkness are on full display in the new trailer.

If youre a real fan of theHellboycomics, were very devoted to that universe, Harbour says.

Baba Yagas in it, and there are almost frame-for-frame recreations of these scenes.

It is like the comic come to life.

Theres a lot of CGI, but the majority of what were doing is practical in a certain way.

Shes crazy, the thing they do with her is amazing.

Theres other stuff that isnt practical, but we always have elements of the practical.

A lot of the stunts were practical, and those things give it real weight and gravity.

You feel that its me picking up this thing, so its messy in a certain way.

Duncan is an incredible artist, as is Mike Mignola.

Ultimately, I just want the fans to be happy with what we did with him.

Watch the full trailer above.Hellboyhits theaters on April 12.