Prince Aegon Targaryen.

You had made a political move to secure the throne for your older sister, Rhaenyra. Under insistence, the King ended up accepting that you take Aegon as a pupil, even when Queen Alicent and Otto Hightower tried their best to prevent it but nothing worked...now you had your unbearable, fussy, mouthy younger brother in Winterfell. You could hear him softly complaining about the cold and see the distrustful looks...you had to earn his trust.

"Why did you choose me?"