synphx
When [Name] [Last Name], a certified loser, gets unwillingly sent to the Demon Slayer universe without ever watching one full episode of the anime. Even worse, with no experience in swordsmanship and lacking strength in all ways possible, it somehow lands her the title of Tokyos most beloved hero.
Her weakness is ultimately her biggest strength.
Now, she's stuck with a glowing blue orb that can talk, and a 10-year-old child who wants to be her disciple.
As she starts to corrupt those around her, [Name] has a secret power that keeps her alive until the end: Plot Armor.
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"Well, it is obvious that my life is in fates hand, and she herself has declared me a worthy hero that's destined to protect those in need. I am the harbinger of justice, the embodiment of peace itself, and with this conviction, I implore you to heed my words. This sword-oh. Where is it? I believe I've lost such a weapon again. Well, that sword is a weapon that's destined to meet my hand. You accuse me of stealing such a thing from a swordsmith, right? Well, tell me boy, is it really stealing if my eyes beheld such a sight? My eyes never deceive, they only perceive those that are honorable for such glory. If I'm able to protect Tokyo without wielding a nichirin blade, does that not put me above you? Demons are a threat to humanity, but does that stop humanity from becoming a threat to themselves? Think about it-war, famine, poverty. Where does it all come from? Now that you know, then let me do my rightful work in stopping crimes-"
"I think I'm in love with you."
"And-uh? Huh?"
Did I mention that [Name] was a little crazy herself?
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YANDERE DEMON SLAYER x WEIRDO! Reader