Welcome to this story! I would like to preface by stating that this character is not a reincarnated, isekaid, or otherwise person of "meta knowledge". They are strictly only an Original Character(OC) and they only have the knowledge that a being residing in the world of DC could have.
This character is going to be an intelligent and charismatic character, at least as much as I can make them so, as a character is only as smart and charismatic as its creator. Further, at the beginning of the story, they will have some degree of personal strength, but not to the point where they could solo someone like Superman. She will be somewhat stronger physically than Aquaman, given the nature of her race, but magically will only be on par with him.
Furthermore, this character will have limited interactions with the main Atlantis faction to start out with, as the focus in the beginning will be on uniting the Kingdom of Sea Lights and establishing herself as the true ruler of the KoSL. Later on, interactions will begin with Atlantis and the other factions, including King Orm, and inevitably, the Justice League and its members.
For the purposes of this story, the total population of the Kingdom of Sea Lights(as estimated by Google) will be around 200 thousand, given its estimates of 1-5 million in Atlantis, and the estimated total of less than 10 million in all kingdoms.
I cannot guarantee a perfect story, nor should one expect my OC to be perfect, as I am as flawed as any of you are.
I will also state that while criticism of my story is perfectly acceptable as I am not well-versed in the world of DC, I ask that you remain respectful to yourselves and others in making comments. Criticism and discussion should be made about the book and on the plot points only; we are not here to insult others. Any comments that make fun of, insult, or otherwise degrade another person for their views or ideas on the story will be removed. Any arguments that you have with each other should be made in private or not at all.
Thank you, and please enjoy my story.