I like how they hid his hand the during his entire speech. He was already dead and his hand was gone but he didn't even realize it. They hid it from the readers so when it was suddenly revealed it was like wtf and the readers had the same sort of reaction that the Oni guy was feeling. Allowed the reader to be in the same mindset and understand his feelings. Extremely effective story telling and artistic design. Something you don't see often in manga.