Drought!AU Backstory for Vokine
The backstory behind Vokine in a roleplay I played her in -- it's not consistent with her 'main canon' but will be used consistently for that roleplay and most others set in the Bionicle storyline before the restoration of Spherus Magna.
Ruhau Nui, Vokine's home island, had a combination of treacherous terrain, dangerous Rahi, and far distances between Koro, to the point where no single Matoran (and only rarely groups) could travel safely between Koro. Groups with a Toa could usually survive the trip between Koro, which was only attempted in times of need or great celebration. When a Toa team became Turaga and passed their Toa stones on to the destined Matoran, it became a rite of passage for the newly-transformed Toa to travel to the temple on the island to meet their new brothers and sisters, receive instruction from the Turaga, and make/be given their Toa tools.
But very shortly after the generation of Toa including Vokine were transformed, the cataclysm that destroyed the ocean struck, preventing that team from making their trip and basically destroying Ruhau Nui. Vokine, still in Vo-Koro and with no way to find out what had happened to the other Toa, built her own Toa tools and ended up becoming somewhat of a wanderer, traveling between islands in search of other Toa, whether they were specifically her brothers and sisters or not.