We want this person to be resilient and good-humoured. So we're going to punch all our possible candidates in the face a few times and see where they want to go from there.
Madness string 4780
Anger is a big fucking rock. It can be a shield that you hide behind for protection. It can be a weapon when you fling it at someone else. But if you hold onto it for too long, it'll weigh you down, because... it's a big fucking rock. Keep it and use it when it's useful, but be willing to drop it when it holds you back.