"... He has struck me as one who is much better with... less of the 'why' things are as they are." It's works out for Yuri, in that 'he doesn't know why it should be impossible, so he does it anyway' sort of way, Duke thinks.

Kind, yet can be a stubborn, and incredibly rude person if he feels like it. Which seems to be most of the time, or at least he feels like being rather rude around Duke.

... Ah, he reminded her that the spirits were ... 'people' too. Or at least in his world's case, they started that way... "For those that became a part of the Adephagos, it likely would come with a return to sanity, which could be startling in a positive or negative way." He's trying to remember what Elucifur had told him about these things, even with the pain remembering comes with.