We have seen a myriad of sexual orientations and genders in the world GRRM has created.
One thing however seems virtually unheard of, that's transgender people.
Are there any characters from the current timeline or history who have shown indications that they might be transgender? I know some people argue that Brienne is transgender given how she feels awkward about feminine identity but I think they are wrong. Brienne has shown us that she is a female down there, when she thinks about the life she might have had, had she been married off to Blackhaven to wed Lord Dondarrion's heir. She pictures herself as a mother there. And then she pours her heart out in front of the Elder brother of the monastery, which pretty much confirms that she is a female both by birth and deep down in her heart. And of course, she was attracted to Renly Baratheon as well, so she is straight. Another candidate often presented is Lysono Maar, a sellsword associated with the Golden Company who looks like a woman and paints his nails. But Lysono has explicitly said in TWOW preview chapters that he is not a woman. He just appears to be a guy born with feminine looks, who is confident about the way he looks. Then of course we have Cersei who has shown resentment that she should have been born a man over a number of times but that's mostly when someone denies her something they wouldn't deny a man or when she regrets that she could have been Lord Tywin's heir if she were born with a penis. Therefore, she doesn't seem like someone with trans tendencies either.
Those three aside then, do we have anyone else?
NOTE: I am not the most well-versed person around regarding the modern take on sexuality and gender. My question is about people who are born in one gender but want to be another. Keeping that aim in mind, If you believe that I may have used some terms or labels incorrectly in the question, please feel free to correct that by editing. Thank you.