The Twin to the Unknown Targaryen

Aerianna is the few minute older twin sister of Jon Snow, but he does not know it. Aerianna has been hidden away on the North Wall and raised by her Uncle BenJen. She was taught to be strong, bold, and dangerous. He strived for her to be able to protect herself till she was of age to leave the wall. There was word of her aunt Daeneyrs , is allied with the Dothraki and is wed to their Khal. Aerianna decides to finally come out of the shadows to fight against the Lannisters and fight for her family to retake what was rightfully theirs. The Iron Throne, but will she gain the affection of a bastard son of a Robert Baratheon named Gendry along the way?
(I DO NOT OWN ANY CHARACTERS EXCEPT FOR AERIANNA)