Not necessarily a crush, and I didn't do it intentionally, but as I was writing Big Dead Energy, I realized the main character reminded me a lot of my ex. If my ex was more of a... shall we say "thinker" than he actually was. But my ex was a loud, gregarious, annoying, gorgeous himbo, and Iyu is at least the first three of those things. I'd worry he'd read it and recognize himself, but my ex does not read.
My partner says Iyu reminds them of our chihuahua, though.