History tells us that Henry Percy was never a very strong character. He was the heir, but he was a scholar, sickly, and didn't have the warrior characteristics of his two brothers, which didn't endear him to his father. He was hopelessly in love with Ann Boleyn, before she came to Henry's notice, and she with him, so it is said, although she probably fancied being the Countess of Northumberland.(If she had been, she would have kept her head but been poor as the Percy's had no money. May not have suited her!) Wolsey put an end to the liaison, but Henry never got over it. He entered, against his will, into a very unhappy marriage with the Earl of Shrewsburys daughter but they couldn't stand the sight of each other and spent most of their time apart. To add insult to injury, I believe he had to sit in judgement of her at her trial.