Prompting for V2 works the same as for V1 so refer to description below. Preview images were made with weight 0.9.
Sadly V2 still share the same shortcoming as V1, that being command spells. Not only they don't work as intended, but tbh I feel like they drag the whole image quality down.
That said, if you're not going to use them then V2 produces more consistent and better outputs in most of cases :) keep in mind that you can add muscular to negatives if you feel like he's looking too buff, which seems to happen more often than before.
Lora model for Kotomine Kirei. I wanted to do it for the memes, but the model ended up pretty cool (although I still have problem with training many words at once). For me it worked best at weight 0.7.
The main tag used is kotomine kirei. To get the FSN outfit add to that cross necklace, black pants, black shirt, purple coat. Fate Zero outfit is similiar cross necklace, black pants, black shirt, long sleeves. You can also change long sleeves to short sleeves if you feel like whooping Shirou's ass.
Hairstyle depends on where you put parted bangs tag. In normal prompt you get the FSN look, in negative prompt you get the Fate Zero look.
I also tried training tags control spell arm and control spell hand, but they don't work so well. The good thing is that when they appear they look fine.
And also I tried to train black keys which you have best chance to get if you use black keys, holding weapon, dual wielding, between fingers. But they don't really look anything like they suppose to.
More useful tags: muscular - extra ripped, stole - priest scarf thingie.