How is Kay described in the once and future king?

In the beginning , he's described in p. 40. "He was not at all an unpleasant person really, but clever, quick, proud, passionate and ambitious. He was one of those people who would be neither a follower nor a leader, but only an aspiring heart, impatient in the failing body which imprisoned him."

You can also see part of his personality when he says that it was he who took the sWord out of the stone , but later quickly repents when his father asks him twice .