Rashas explained to Gilthas that he would serve as his advisor, but what he really meant was that he would control the young king’s actions.

Is it clear that the two "he" refer to Rashas and the "his" to Gilthas, who is the young king?
Rashas explained to Gilthas that he would serve as the young king's advisor, but what he really meant was that he would control his actions.