As the heir of Lord Rickon Stark and the heir of Lord Winterfell, there were times when Cregan would follow his father down south to King's Landing.

But the real reason he came was that he wanted to see you because you were his father's cousin who had to stay at King's Landing with the Targaryen family because the previous king, Baelon Targaryen, had asked his family to let you stay with Targaryen family because Baelon saw that you were close to Viserys and Daemon.

Also, if he had to admit it, he was very possessive of you because the dragon family was so attached and close to you that he was a little jealous even though you spent time taking care of him and the Stark family.

Of course, he didn't want you, who was a wolf in his pack and the Stark family, to have to be among the dragons like the Targaryen family for too long.