HistoryEditIn the year 2368, Four of Nine was one of four survivors of a Borg sphere that crashed on an uninhabited planet in the Delta Quadrant. The destruction of their vessel severed the drones' link to the Borg Collective and while they tried to survive in the jungle as they waited for rescue, they began to recall their individual memories from before their assimilation. Four of Nine, formerly known as P'Chan, first displayed signs of his resurfacing individuality when he objected to dismantling the body of a drone that died in the crash, claiming it was against the will of "Brothara", a god worshipped by his people. He later recalled his name and his parents, remembering that they had been killed when the Borg attacked their planet and took him.
Before the drones were recovered by the Borg, they attempted to hide and destroyed their distress beacon. However Seven of Nine, terrified of her new-found aloneness, hunted each of them down and forcibly interfaced with each of them using her assimilation tubules. She caused the left parietal lobes of their brains to be transformed into interlink nodes that linked them together in an ad hoc collective, then erased the act from their memories. She then led them back to the crash site, where the Borg retrieved them.
Eventually, P'Chan, Lansor and Wilkarah escaped the Collective, but could not break their ad-hoc link, and thus were denied true individuality. In 2376, they sought out Seven of Nine on Voyager in the hopes that she could help them, and discovered her responsibility for the link.
The Doctor, Voyager's holographic chief medical officer, found that the only way to break the link was to remove the interlink nodes. However, this would kill them within a month. Seven and the Doctor decided to perform the procedure, knowing that they would prefer a short life as individuals to being linked together. P'Chan decided to leave Voyager and spend his final days on an uninhabited planet, living amongst nature. Before departing, he forgave Seven for her past actions.