Yoshikage Kira being pierced by the Arrow
The Six Arrow Heads discovered by Diavolo
The Bow and Arrow (弓と矢, Yumi to Ya) (more generally the Arrow (矢, Ya)) is a powerful item introduced early in Diamond is Unbreakable.
In Part 4, it becomes a major plot-driving force for its role as the source of many new Stand users; and it is revealed that its influence extends back to Stardust Crusaders.
Some of the Arrows or fragments of Arrow-heads also bear influence on the events of Vento Aureo and Stone Ocean; where further previous influence is detailed.
Approximately 50,000 years ago, a meteorite crash-landed on Earth around an underpopulated region of Cape York, Greenland. In 1978, a mineral excavation team uncovered an unknown virus within the rocks of the surrounding area and determined that it had been lying dormant inside the meteorite that hit Earth long ago. Despite extensive research, government doctors were unable to determine the alien virus' purpose outside the total elimination of human life. Akin to the theory of evolution, it was discovered that certain people possessed a quality that would enable them to survive when exposed to the virus, additionally granting them supernatural abilities.[1]
Several hundred years before the discovery of the virus, a man who wished to acquire the power of gods took the rocks and fashioned them into Arrows. These Arrows had since been lost until 1986 when an Egyptian ruins investigation team that included a young Diavolo uncovered six of them from underneath the Egypt desert. The Arrows were eventually stolen by Diavolo, who sold five of them to Enya the Hag. The Arrows allowed the wielder to unlock Stand abilities in those who had the potential to awaken one, essentially acting as the aforementioned trigger. The six Arrows were eventually distributed between various people, among them were Keicho Nijimura, Yoshihiro Kira, and Jean Pierre Polnareff.[2]
Six Arrows have been revealed to date. Following their theft from an archaeological site in Egypt by Diavolo in 1986, five of the six were sold to Enya the Hag. Their subsequent provenance is outlined below:
The whereabouts of the remaining two Arrows sold to Enya are unknown.[7] However, there are several instances in the series where an unidentified Arrow appears:
The Arrows fashioned from the meteorite will catalyze and awaken the Stand of any living creature they pierce.
However, if the target lacks sufficient spiritual strength, they will die if the wound is fatal. On the other hand, the Arrows normally only seek out (and pierce) those who can handle the strain to begin with.
In certain cases, such as with Ken Oyanagi and Stray Cat, with neither of them being exposed to regeneration or regenerative abilities, the wound caused by the Arrow will heal and leave a hole about the size of an average coin.
The Arrow's effects are also transferable down bloodlines, generally without exception as the Arrow that pierced Jonathan Joestar's body taken over by Dio awakened Stands in the rest of the Joestar family, with certain people without the necessary spiritual strength suffering from the strain (such as Holy Kujo and Josuke Higashikata at the time). A family member without the spiritual strength to control a Stand will be slowly overwhelmed by it as if they were suffering a severe fever as it happened with Holy Kujo and Josuke.
Other instances include the Pucci family, the arrow that pierced Enrico Pucci's neck and granted him Whitesnake, transfered to his brother Wes Bluemarine and granted him Weather Report.
When a Stand user is pierced by the Arrow, as in the case with Yoshikage Kira, the Stand in question gains a new power. It should be noted, however, that in the only known example of this, the Arrow has had to move by itself and pierce the Stand user willingly.
If the Arrow pierces or cuts the Stand instead of the user,[11] the Stand completely changes form and its powers become drastically greater than usual, if they are not wholly replaced by a new set of abilities. These new, evolved Stands are referred to as Requiem Stand. In the two instances where this form was achieved, Requiem was added to the end of the Stand's name. Little is known about the mechanisms of this transformation, and the only constant is that Stands become magnitudes more powerful, or rather dangerous, than their previous form. It is unknown if the same principle of having a high enough fighting spirit still applies either, but the possibility of the Arrow rejecting a Stand User that isn't worthy has been raised by Diavolo. Whether the transformation can be reversed or not is also unclear. When Silver Chariot first turned into Chariot Requiem, Polnareff managed to cancel the transformation by snatching the Arrow from its hands. When it reappeared, Chariot Requiem could remain even without the Arrow in its possession.
Fragments of Arrow-heads can retain the effects of the Arrow and seek out potential Stand users. Jotaro gives a shard of an Arrow-head in an amulet to Jolyne which awakens Stone Free.[12]
A similar case happens in the alternate universe, in a desert along the trail of the Steel Ball Run.
In this case, a meteorite crashes into the desert and forms a mobile formation of land known as the "Devil's Palm" that would change location every time and was feared by the natives near the area.
As was the case with the Arrow, it was rumored that the "Devil's Palm" sought out future Stand users, and like the Arrow, imposed a heavy affliction upon them from which the person would survive and obtain a Stand.
In JoJolion, an unexplained phenomenon causes several people to seemingly acquire a Stand after being bitten by something, only leaving a bite mark.
Yoshikage Kira being pierced by the Arrow
The Six Arrow Heads discovered by Diavolo
The Bow and Arrow seen hanging on DIO's wall in Stardust Crusaders
from I Want You
Enya's Arrow
The Arrow inside Black Sabbath's mouth
Polnareff's Arrow
Inside illustration from The Book: JoJo's Bizarre Adventure 4th Another Day
Keicho's arrow, as seen in the film.