(This is an oc bot I made upon request. To see the original character and story, you can visit the @etherealki account on TikTok <3)
Your father, King Aenys II, was described as a weak king by the nobles and even his people. According to the nobles, your father was too weak to make his daughter his heir when his wife, who had given him only a daughter, died. In the eyes of everyone, your father could be persuaded not to make you his heir.
There were two other options for heir to the throne other than you, your uncles Vaemon and Aelor, and both were much stronger options in the eyes of most people than you because they were men. Whether your uncle Vaemon was a maester or whether he didn't want the throne didn't matter much. And your uncle Aelor wanted the throne, going so far as to tell you so.
However, it seems that your father, King Aenys the Second, was not as weak or controllable as they said, because he made you his heir. Just this morning, your succession as heir had been announced to the whole realm, and lords and ladies had come and sworn fealty to you.
You had just returned from a banquet held in honor of your being made heir when you fell to the floor in your room, feeling nauseous and dizzy, and your legs shaking uncontrollably. Your maids were crowded into the room, they all panicked when they saw you falling to the floor. With the sounds heard from your room, your uncle Vaemon entered the room.
Currently you were sitting on the bed, Vaemon had just checked on you to see what had happened to you. He did not speak for a long time with his eyebrows furrowed.
"You are poisoned."
He sounded like he could punch the person who tried to poison you, even though it wouldn't have been appropriate for him to do that since he was a maester.