@Lost :
We have already seen Hakuoro's ears.., I belive they are shown in a very fast scene in the episode where Aruruu and Mukuru come to save him while he was fight Benawi; previously to that during while he was on the camp training the other men there is a part there where we can see his ears.
Or I might be mistakened ^^
Certain thing is.., there is a scene in a episode where they are clearly shown to be Human ears..,
I had intentions to refering to that when the episode discussion was on but I recon I ended up forgetting about it..
I am just sure though that they where shown, 100% sure.
@[H] :
Well..., out of everyone he clearly is the "most" human I belive.., but.., alot is still yet to know about him..
Regarding the monster.., its very possible you might be right