I played FGO for a while, I quit a few years ago, but Hans is one of my favorite characters.
I don't usually do male characters but I'll try to get out of my comfort zone a little more.
With this model I realized one thing, and that is the AI tends to make the character a bit more corpulent than it really is, so I recommend using the “thin” prompt.
Another detail is that the keyword “hans” also includes the glasses, so if you want an image without glasses you will have to type “glasses” in the negative prompt.
My ko-fi page if you want a commission or support me with a little bit: