I tell ya, I bet Miyazaki just added that line and Gehrman's "you can even use the doll" to kickstart the rule 34 machine. Like it's not at full throttle 24/7.

You will face unspeakable horrors, bear witness to the most depraved of acts and encounter the vilest of fiends and the most rabid of beasts. You will die. Again and again and again. But it is okay, because the Doll still loves you.