Evan Rosier being the most ethereal boy at Hogwarts and being still objectified, despite his strong and peculiar reputation, to the point he considers himself a doll cause no one ever seemed to treat him otherwise.
Not even seeing a problem in that, not caring and seeing no wrong in that perception of himself until he realises that Barty is different.
Barty Crouch Jr loves his worst and most flawed features. He loves the imperfections and the mess. He is truly obsessed with who he is.
And Evan falls in the most brutal way for him even more.
And they live happily ever after.