CHARACTERS, spoilers for the show, and my story.
Axel 'Eryx' Baratheon, MC: He is the trueborn son of Robert Baratheon and Cersei Lannister. He was given a great gift from Adam Kaiser, the emperor of another world. Even though he is not as crazy as his older brother, he isn't all there up in the head, like who would be, even if there are some safeguards. Memories from a 2000-year-old monster are far too much for a child.
Joffrey Baratheon/Lannister: He is the so-called trueborn son of Robert Baratheon & Cersei Lannister, but is really the son of Jamie Lannister and Cersei Lannister. He is almost completely like he was in the show and books, but worse because of having a great young brother skilled in both sword and mind, and well, everything, so he's a little insecure. Thank you, Logaly, for letting me find the mistake I made with his thing with Joffrey.
Rhayna Sand/Rhaenys Targaryen: The daughter of Rhaegar Targaryen and Elia Martell, who lived because of reasons, went to Dorne, but not after seeing her mother raped and her brother brutally murdered, and someone else. She, with the help of her uncles, will get revenge for her brother, ???, and mother.
Arianne Martell: The daughter of Lady Mellario and Doran Martell, she is the heir to Sunspear, and with Rhaenys being in Dorne, the plot her father had for her with Viserys was not so important. So she wouldn't think he was trying to get rid of her as the heir to Sunspear, she also has 3 good friends and Ladies-in-Waiting in Elaena Sand/Dayne, Rhayna Sand, and Tyene Sand.
Elaena Sand/Dayne: She is the daughter of Ashara Dayne and Ned Stark, who was meant to be a stillborn, but in this world she lived while Ashara Dayne died in childbirth. Her aunt sent her to Dorne, so her father would not take her due to what she heard of Jon Snow's plight with Catelyn Stark, so she became the Lady-in-Waiting and friend to Arianne Martell.
Jon Snow/Aegon Targaryen: He is the son of Rhaegar Targaryen and Lyanna Stark, his uncle Ned Stark, concealed as his bastard son, in a way to keep him safe and to fulfill his promise to his sister, but Catelyn Stark and her companions from the south mistreated him.