feotakahari

If there's any game that's just crying out for a Rationalist fanfic, it's Stacking. Characters with the titular ability can possess people, but only with direct contact, and only someone who isn't looking at them. Their original body disappears until they either leave or are forced out by their host's incapacitation, whereupon they'll reappear next to the host. No one can perceive them doing this, and very few characters even know it's possible--from other characters' perspective, the person who Stacked just sort of goes away, and they don't have a clear idea how. The host doesn't remember being controlled, either, and wakes up unharmed a little while after being released, with no idea what happened. Finally, it's possible to Stack multiple people at once, and when you release them, you can just release the last one you possessed. So when they wake up, they won't be next to you, they'll be next to the other person you Stacked. (We'll leave out the size rule here because it's weird and not very Rationalist.)

The villain also has this ability. None of his plans utilize it. So give this to a true mastermind and watch the fireworks.