This is fabulous. So rich and multilayered, you have brought out and highlighted a side to Josef Kostan that I, for one, don't spend a lot of time exploring in my fic. Yet, it is entirely plausible that when your lifespan extends over centuries, the personality develops in different ways.
Chillingly plausible.
Mick is so wonderfully and comfortably dedicated to being a heroic, charming, gentle, romantic, guardian of humanity. Josef isn't and treats Mick's predeliction rather like a childhood stage he is going through. What if it is...

Wonderfully done!
Thank you!
Jenna