The Prince is obviously manipulating the third son and will drop him at a moment's notice when things go south... but it's still not clear if the Prince is virtuous
Guess we'll find out in 2027 when his plotline resolves
In these fantasy settings I feel like nobles and royalty would be far more cautious of belittling superhuman heros. No way has some noble not fucked around and found out how quickly a hero with more pride than sense can make mincemeat of them and all their guards.