Hey quick question, does Bendy still have any kind of demonic power after they're back in the real world?
Oh, absolutely. He doesn’t stop having to be careful just because they’re no longer in a distorted real-life cartoon.
In fact, the real world is arguably more dangerous to the toons – water is nowhere near as bad as acetone, but being that their ink is water-based, it can slowly wash them away. (It’d take a significant amount to do it, of course – they won’t be jumping in any pools in the near future, that’s for sure.)
And while Alice and Boris will suffer injuries due to their ink being washed away, there’s nothing beneath the ink to risk coming out if it IS washed away. In Bendy’s case, though, the more damage he takes emotionally or physically, the more the veil wears thin, and the more at risk he is of displaying his true demonic self. That would be good for nobody, Bendy especially.