The third prince trial was an easy one since it has to do with his carefree lifestyle whereas the fourth prince trial was not being able to forgive himself for not being by his father's side. He believes if he hadn't gone on his adventure, he wouldn't have been poisoned but still decided to let it go and vow to stay by whoever becomes the king even if it wasn't his fifth brother.
The fifth prince test was kind of awkward since it has to do with his love life. Ever since the condition of the king started getting worse, he began to distance himself from Elisa and only go to her when he needs her help. Finally realizing how serious he's taking it, he decided to have a chat with her once they are done with the test or not.
Creation is hard, cheer me up! VOTE for me!