1 Work by FiveTail in Naruto
Hidan reluctantly takes on a religious apprentice: a reserved, devoted girl willing to go to extreme lengths to gain her teacher's recognition. She is nothing special. He treats her about as well as you'd expect.
Hidan/OC. NSFW. First chapter revised PWP from years ago, character-building to follow. Read through the tags carefully for content warnings. Not a comprehensive list.