Foo Fighters

Foo Fighters (フー・ファイターズ) (commonly referred to as F.F) is an ally of Jolyne Cujoh featured in Part VI: Stone Ocean.

Appearance
F.F's can shift its appearance at any time it pleases. Due to her plankton inhabiting its body, F.F can contort in impossible curves and even slip through barred fences unharmed. The body that it forms into were its sub-body, which it takes initially fighting Jolyne and Ermes, and the main body, which it takes outside the water and when it has collected enough plankton. The bodies it has taken over were the unnamed three prisoners, and most notably Atroe.

F.F is commonly shown carrying a 32 oz. cup near her when she is not near a water source.

Personality
F.F was shown not to have much eye for detail prior to meeting Jolyne Cujoh and Ermes Costello, and laments its pitiful existence upon expecting death after being defeated by the two. When Jolyne saves her, however, F.F immediately begins to notice more details around her, and she began to perceive the world around her as being more colorful. Although she likes the other people she has met, she has the strongest affinity for Jolyne for giving her freedom.

Birth
Enrico Pucci had a shack of Stand disks near prison grounds, a collection of different Stands that he had collected over the years while in prison. The area around the shack is generally untouched and desolate. Enrico needed a guardian for these disks, lest they fall into unwanted hands. He threw a random stand disc into the ocean, which hit plankton floating on the surface. Unexpectedly, F.F was born.

Guarding The Stand Discs
F.F, or Foo Fighters, was told to stay there by Pucci and to kill anyone (other than him) should they come close. Having no other purpose, it did as it was told. When Jolyne and Ermes approached the shack during an outdoor activity, F.F attacked but was soundly beaten by both of them. Parched and close to disintegrating, it lamented its meaningless life, but was spared by Jolyne, who gave it water, despite Ermes' protests. Fascinated by its savior, it showed Jolyne her father's missing stand disc in gratitude. Subsequently, F.F inhabited the body of a dead inmate and followed both of them back to prison.

Risk & Reward
After following Jolyne & Ermes back to the prison, F.F. is later seen playing catch with Ermes and Jolyne in the courtyard, with awkward throws. After they get used to it, Miraschon places a wager, to catch & throw 100 balls for $200. They succeed in the bet without repercussions, but Miraschon places a even higher wager, 100 catches for $1000. This intrigues Ermes, to where she throws instead of Jolyne. When they reach about 31, a guard grabs F.F., screaming that outdoor time is over. She throws anyways after realizing that whatever interferes, they lose the bet. Ermes then bribes the guard who looks the other way, but he takes away Ermes' glove causing her to drop the baseball. She uses Kiss to bring it back to her, but this is against the rules and Ermes pays for it literally, as Miraschon uses her stand, Marilyn Manson to collect $380 worth of money, Ermes' gold tooth, and her liver. Jolyne takes her place and raises the wager, 1000 catches for all that was taken from Ermes. Jolyne and F.F. throw the ball all while chasing down and defeating Miraschon.

Aiding Ermes
Much later F.F. reveals to Jolyne, Ermes' past about her sister Gloria, & her killer Sports Max. The two race to find her, only for F.F. to fall victim to Sports Max's stand Limp Bizkit. Later, F.F. heals Ermes & Jolyne, however Ermes' injuries were so severe that she was out of action for a while.

Protecting Jolyne to the End
F.F. meets Anasui, who is adamant in finding Jolyne, However not for her well-being, but to marry her. As they reach the Punishment Ward, F.F. saves Jolyne from Kenzo and gets into a heated struggle with him.

Later, tricked by Pucci, F.F leads its friends into an ambush and suffers a severe blow to its body, knocking its stand disc from its head. Dehydrated and nearing death, it was able to hear the dying request from Anasui. He gave it permission to possess his body to pluck Jotaro's memory disk from him, not caring what happened to him as long as Jolyne would be happy. F.F did pluck Jotaro's memory disk from Anasui's body but refused to possess it. Its spirit (strangely taking on the form of Etro's body) heals Anasui's wounds and thanks Jolyne for being her friend, glad that they met. When Jolyne decided to retrieve the disk to revive her, F.F declines, saying that it would not be the real her, but another F.F and disappears into the wind.

Jojo's Bizarre Adventure: All-Star Battle (PS3 Game)
Foo Fighters appears on the PS3 title as an support charater for the Campaign Mode. Where she appears and gives the player two choices, either inflict 150 HP to any boss or gain 1 energy bar of health. Foo Fighters is also the only ally-character from PART VI who does not appear on any interactive form on the match (Both Annasui and Ermes are playable characters and Weather Report and Emporio appears as part of stage hazards).

Trivia

 * True to its word, F.F was the only protagonist to not have a counterpart at the end of Part 6.
 * The origin of the name Foo Fighters actually derives from an American comic "Smokey Stover" which was a comic about a Fire Fighter. The comic commonly used the nonsense word "Foo." In World War II, UFO's that resembled balls of fire were labeled as "Foo Fighters" in reference to the word foo and fire fighter used in Smokey Stover. This UFO would later become the namesake of the rock band Foo Fighters. F.F's affinity to water could be a reference to the fire fighter in Smokey Stover, who mainly relies on water to extinguish flames.
 * F.F is one of the few characters in the franchise to use a gun as her main weapon, the others being Mista, Hol Horse & Johnny Joestar (in the form of Tusk).