Brain Storm

is the Stand of Urban Guerrilla, featured in JoJolion. It is a colony of small blocky Stands that can melt flesh when they sting someone.

Appearance

Brain Storm is a colony of pointed block-like creatures which resemble burr puzzles. It has spiked feelers that can extend to penetrate the surface of skin.

Brain Storm is violet and dark purple in the colored manga.

Abilities

Hemolysis

Brain Storm is a bacterial-like Stand that Urban Guerrilla sends out of his hands, which can melt the flesh of anyone touching it. First, they grab onto the surface of the skin with their feelers. They break through the skin and their feelers extend inside the victim's body. The Stand causes hemolysis and enters deeper into the body, while also constantly multiplying exponentially. This causes the target's body to break down as if holes are being dug into it.^[1]

As Rai Mamezuku points out, once the Stand has made its way into the body it is impossible to remove, requiring immediate amputation to prevent death. However, the Stand is easily washed away with water if it has not entered the body yet.^[2]