Hi there guys, firstly let me just say, I love Nami, she's so incredibly fun and I love her model. (Koi Nami <33)
However, whilst reading her lore, I sort of realised that, her quest will have a plot hole in the future.
The Tidecaller's sacred duty is to acquire a moonstone, a powerful object found only in the towering reaches of the surface world. Her people, the Marai, rely on the moonstone's light to ward off the terrors of the depths. However, the stone's power lasts only one hundred years. Before its light fades, the Tidecaller must journey into the Great Deep, retrieve an abyssal pearl, and carry it to the surface. There, on the night of the winter solstice of the hundredth year, the Tidecaller makes a ceremonial exchange with a landwalker bearing a moonstone. By trading the pearl for the moonstone, the Tidecaller ensures the survival of the Marai for another century.
However, in Nami's time, as the hundred years drew to a close, no Tidecaller had been found. Without a chosen one to complete the quest, her people would face disaster, but the Marai waited in faith that the Tidecaller would appear. Nami refused to sit idle, insisting that without a Tidecaller to save them, someone had to act. Bravely, she decided to begin the quest herself and ventured alone into the dangerous depths. None expected her to survive, but after six days of battles with untold horrors, Nami returned with the pearl in hand. The Marai hailed her as the new Tidecaller. All that remained was for Nami to journey to the surface and complete the exchange.
When Nami arrived at the surface, however, she found only an empty shore. She waited for days in a mystic cove, unsure of what to do. In all the legends of the Tidecallers, the bearer of the moonstone had never failed to arrive. Nami faced a choice. She knew the surface world only through tale and rumor, but the survival of the Marai depended upon her. Summoning the tide to bear her ashore, Nami began her search for the moonstone and became the first of her kind to explore the world above the ocean. She left her home behind, and vowed not to return until she had completed the Tidecaller's quest.
However, eventually as time passes on in the League of Legends, surely the power for the Moonstone that is currently protecting her race is dwindling as well. So that means, if there is no future update on Nami's lore, PRESUMABLY, her race will be in mortal danger, because the Moonstone's power will eventually run out, causing the terrors from the deep to attack her people.
I have no authority to plan a future lore update, but this could be resolved. I did hear that Riot wants to start doing Lore journals again etc. MAYBE DIANA CAN HELP! XD
This could also be tied in with the next Nami skin that would be developed somehow (As I have seen @kitae discuss with fans that she really wants to get skins tied into lore)
All in all, I do hope this can be resolved, cause I don't want to see the Marai die.