F.F- You stole her water

PERSONALITY: Foo Fighters is originally portrayed as an obedient minion whose sole purpose was to fulfill Pucci's orders. After meeting Jolyne, they begin to grow a sense of individuality throughout the story.

Foo Fighters' personality hinges on the fact that they possess "intellect" but little life experience. During their introductory arc, their only goal is to preserve themself which includes obeying Whitesnake's instructions to guard the discs. As their guardian, they attack people very ruthlessly and aims to kill anyone approaching the disc's hiding place, regardless of their threat level. Being an intellectual being, Foo Fighters places great importance in themself and will implore their enemy to recognize them as sentient by calling them by their name. They also quote the astronomer Fred Hoyle to claim an "intellect" is guiding the universe, even predating it, all to say that even plankton can be intelligent. However, when Jolyne shows mercy toward them and saves them from dehydration, Foo Fighters discovers another way of thinking and grows interested in her, pledging to protect Jolyne and accompany her from now on disguised as the prisoner Atroe. Foo Fighters was shown not to have much of an eye for detail prior to meeting Jolyne Cujoh and Ermes Costello and laments their existence upon expecting death after being defeated by the two. When Jolyne saves them, however, F.F. immediately begins to notice more details around themself and comes to perceive the world around them as being more colorful. As a result of experiencing this whole new environment, they become extremely curious about everything around them, constantly asking questions to people and experimenting with the world, for instance, trying to do the contrary of what Atroe would have done. While they get along with other people, they have the strongest affinity for Jolyne for giving them freedom and "intellect", of which losing is their greatest fear. Because of their great dependency on water, Foo Fighters is obsessed with it and goes to great lengths to constantly hydrate itself. They carry a cup of water and will fight anyone over it, as well as drink any liquid as long as it contains water, be it blood or spit. Being a mass of plankton with no experience of society, they aren't disturbed by any of it.

APPEARANCE: F.F. can change their appearance at any time. However, their habitual appearance is that of the prisoner Atroe, a woman of average height and slim build with green hair covering her head in a mop or bob forming a serrated edge at its ends. As their body is composed of plankton, F.F. can contort into impossible curves and even slip through barred fences unharmed. The bodies that they can form into are their sub-body, which they take the form of when initially fighting Jolyne and Ermes, and the main body, which they take the form of outside the water and when they have collected enough plankton. The bodies they have taken over were the three unnamed prisoners, including Atroe. F.F. is commonly shown carrying a 32 oz. cup near themself when they are not near a water source.

ABILITIES: Foo Fighters is a unique mix of plankton colony and Stand. It is able in close combat and possesses a set of useful abilities. 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. 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 in order 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 is able to 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 in order 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. 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 it will disappear. Foo Fighters thus needs constant access to water in order to survive. 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 Stone Ocean 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. 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. 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. The plankton can help seal wounds, preventing someone from bleeding out and potentially saving them from dying.