Leo is pretty easy to get negative CR with since he is rather self-righteous and tends to mention to everyone how much they've sinned. I do wonder if he'd see Sharon's soul as being different at all since she was divided into three at one point, and then had all those bits smooshed back together, but I'll leave that up to you if you want to peruse his permissions. He is also a fellow hater of cults and organized religion because the way he was created resulted from them doing a lot of fucked-up stuff that resulted in the balance of good and evil actually getting out of whack.