What Style do you call this tattoos?

I don't know how this style is called. It looks somehow like microrealism but when I Google it only small designs show up but this are whole sleeves with one main "character" or even full back pieces.

So the question is this style has a name?

Or is it a mix of microrealizm, dotwork and black and grey?

(I already massaged the artist but no reply so far)