Foo Fighters (Stand)

"Foo Fighters! If you're going to refer to me, call me by that name!"

- Foo Fighters

Foo Fighters (フー・ファイターズ) is a Stand featured in the sixth part of the JoJo's Bizarre Adventure series, Stone Ocean.

Foo Fighters allows bundles of plankton to exist in a humanoid form. Adopting a personality, along with the nickname F.F.; it sides with the allies of the story.

Appearance
Foo Fighters takes two main appearances. Naked, it is a tall, dark, robotic humanoid of masculine proportions, and an alien visage. Later, it maintains the appearance of the dead prisoner Atroe; a woman of average height and slim build.

As F.F.'s identity develops due to her experiences with Jolyne, the true form of her Stand takes on a more human appearance starting to resemble the body she took over while still retaining some of the features of its older form.

Foo Fighters is black and gray with yellow highlights in the colored manga.

Personality
Highly intelligent and originally commanded with the task protection a collection of Stand discs by Whitesnake, Jolyne Cujoh helps Foo Fighters to discover a consciousness and identity. Being given the nickname, "F.F.". It is implied that if the entirety of Foo Fighters's plankton colony is killed and the Stand is reduced back to a DISC, they will lose all of their memories, learned experiences, and identity, once again becoming a mindless Stand when re-introduced to a new plankton colony.

Abilities
Foo Fighters is a unique fusion of a plankton colony and Stand. It is able in close combat and possesses a set of useful abilities. At a physical level, Foo Fighters is more than a match for the power type Stone Free, being able to deflect its punches and overpower it. Although Foo Fighters is particularly resilient to physical attacks, it is very dependent on a constant water supply to keep the colony in water and breaks down the moment it is dehydrated.

Plankton Colony Form
Foo Fighters' peculiar nature as a sentient colony of plankton gives it several abilities.

First and foremost, Foo Fighters' nature means that it has no physical weakness. There is no limb to hurt or vital point to strike to kill it and thus it is impervious to conventional attacks. Only by damaging the whole colony can Foo Fighters be threatened. Although fragile individually, the colony can muster enough strength to pry open an automatic door.

As a hive mind, Foo Fighters can produce sub-bodies by splitting the colony into several like-minded but independent parts. This ability allows Foo Fighters to effectively fight multiple opponents and generally act stealthily in the middle of battle. Even if a large majority of the plankton dies, only one needs to survive for Foo Fighters to be able to regenerate. As long as there is water, the plankton colony can rapidly multiply, creating a new part of Foo Fighters rapidly and giving it great regeneration ability. With enough water, Foo Fighters can even cover a whole room and use its mass to attack.

It also means that ordinary humans can see the body.

On the other hand, Foo Fighters is extremely susceptible to dehydration. If its moisture is sucked away by dry matter, the plankton colony rapidly dies and will disappear. Foo Fighters thus needs constant access to water to survive.

Body Invasion
By infiltrating someone's body, Foo Fighters can take over their consciousness and have access to their memories. That way, it can wear their skin as a disguise to infiltrate human society. It took over the corpse of Atroe and spends the rest of the story impersonating her. It can also shape its host to its liking and contort itself beyond what a human can do.

The parasitism allows Foo Fighters to survive without a constant intake of water, but it reduces its agility. Moreover, it becomes susceptible to bleeding out and losing the moisture anyway.

Water Control
Foo Fighters can manipulate water to some extent, with enough control to create a square mirror out of one third of a cup of water.

Plankton Shot
Inside a host, Foo Fighters can shoot small parts of itself as if it was using a gun (this is later shown to incorporate pistol parts into its hand). The bits of plankton colony can invade someone's body and take control of it. The shots have enough strength to pierce through skin.

Wound Sealing
The plankton can help seal wounds, preventing someone from bleeding out and potentially saving them from dying.

Gallery
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Trivia

 * Araki tried to draw something insectoid or reptilian. He thinks it looks more like a chameleon, a mutant, or a space alien than a microscopic organism.
 * Araki also mentions that the design might be an alternate version of Hierophant Green.