[quote=TheBlueShotgun]
Why does the king trust him to be on the lead his bodyguard if he's untrustworthy? I'm assuming the king can control who occupies this position and it seems weird at first that he'd allow an enemy to get that close. Also, how large is the bodyguard? A few dozen men? Or closer to a hundred?
[/quote]

Because, being the bodyguard's leader, he is a rather powerful man, and his soldiers are more loyal to him than tp to the king: by attempting to remove him from his position, he'd risk a revolt. The bodyguard numbers around two or three hundred men.