Since I haven't read it, I can only guess. It might have a young and ambitious starship pilot as one of the main characters. There could also be an old, wise scientist who provides the knowledge and guidance for the exploration. And perhaps a tough-as-nails engineer who keeps the ship running in the middle of all the chaos in the uncharted regions among the stars.
Nathan Drake is the central figure. His brother Sam Drake also plays a major role as he is the one who drags Nathan back into the treasure - hunting world. And Nathan's wife Elena Fisher is also important. She is often there to support Nathan and is involved in some parts of the adventure.
It could be a young adventurer and an old wise hermit. The adventurer stumbles upon the hermit's dwelling during one of his expeditions. Despite the age gap and different outlooks on life, they form a deep bond that neither of them expected, which is an uncharted kind of love.
Given that we don't have details about the 'uncharted waters online story', the main characters could be diverse. There could be a brave female pirate who defies the norms of the virtual sea world. She might be joined by a tech - savvy crewmate who can hack into systems or unlock hidden features in the game related to the uncharted waters. Additionally, there could be a reclusive inventor who has created a unique ship that is better equipped to handle the perils of the unexplored waters, and all of them together form the core of the story as they embark on their adventures.
I think Uncharted Story is good. The way it unfolds keeps you hooked, and the settings and action scenes are well-done. But, of course, it's subjective - different people have different standards for what makes a story good.