Jail House Lock

Jail House Lock is the Stand of Miuccia Miuller, known as Miu Miu, and features in Stone Ocean. The humanoid Stand has a brain-shaped head, a gaunt frame, and cone-like arms. Its surface is stitched all over, with markings across the chest that echo the seams of denim pockets. Colored art gives it a light brown body laced with red strings.

The Stand fights mainly by crippling minds rather than bodies, though it can slap Jolyne hard enough to throw her into a wall. Its core effect is a strict limit on short-term memory: a victim may hold only three new pieces of information at a time, and the arrival of a fourth pushes out the first, and so on. Everything learned before the moment of activation stays intact, but nothing new sticks. It can catch many people at once, up to dozens.

The trigger is contact: touching the bars or walls past the visiting room of Green Dolphin Street Prison sets it off, as does Miu Miu deliberately turning it on someone. The effect is brutally disabling, drowning victims in a stream of fresh input so they forget vital goals like locating Miu Miu, and she claims the endless loss eventually wrecks a person's capacity to think. She also weaponizes it directly, flooding a foe with information so they lose track of her actual attack. One workaround is to absorb many facts as a single unit, for instance reading the count of bullets from one mirror reflection rather than noting each one.

Miuccia Miuller, called Miu Miu, is the only user. Her memory-stripping power weakens enemies so thoroughly that she can confront them face to face, and she uses it to keep the prison's inmates and guards from acting against her.