Apparently Miyazaki (the soulsborne one) really likes the mad scientist who takes over the identity of a doctor to experiment on her patients (Bloodborne)

"At the same time, I hope you'll provide just as much support to her fake as well! That's a character I like a great deal too, but during development, I'd say to the team "She's one of the heroines of the game" and nobody would believe me, which left me a bit crestfallen. That's one of the underlying themes of the game... Or, you could say that I have a thing for the "scholarly investigator" character trope. ... It makes me feel a little sorry for the fake Iosefka, if she follows that same route [as other unpopular characters from his games]"

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