Artist: Shiren | bluesky | pixiv | twitter | patreon | danbooru

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Power is cute but the one meme I've seen indicates that she does not shower, wipe her ass, or eat vegetables.

This leads me to assume that she would not be pleasant to be around.

She's a corpse reanimated and possessed by the Blood Devil (a "fiend" in the lore), and starts off with zero human sensibilities. She was basically feral.

She becomes more human over time. Starting with a cat that she initially intends to eat, but which she ends up so attached to that she tries to sacrifice the main character to the Bat Devil so it would give back her cat.

And that's how she met Denji and entered the story.