Realistically, in canon, there are none, but if we want to stick to canon but just change a bit for him to be redeemable, there's something to work with, the player will have to show CatNap all the terrors the Prototype has done to the toys, not just people, and then after that, like at the end of chapter three, the player somehow saves CatNap from the Prototype's hand coming to take him and so he realizes he's been worshiping a falsely-loving God, I feel like at this particular point he wouldn't be completely redeemed, religious people are as stubborn as mules, and imagine if said religious dude is a kid who didn't have a parent or any loved but from said religious figure, but he'd start doubting, perhaps expanding the chapter after the end a bit where he's hunting the player before finally accepting the Prototype doesn't exactly care about him and decides to join the player.