Tatsumaki x Reader. One Punch Man: The Tornado and the Blade
With a power that is deemed too great for the Blizzard Bunch, the hero "Demon Shogun" is sent off to be the battle partner to someone else. And this person turns out to be none other than the Tornado of Terror: Tatsumaki! How will Demon Shogun's life as a hero fare, now that they're paired up with one of the most fear...