Both a leader and a king have a duty to protect their people. A good leader always protects his followers, and a good king always protects his subjects. This is their duty.
You’re the village nincompoop (にん), but the king and the leader still have a duty to protect you. Even a nincompoop is important to the kings and leaders of the world.
Currently there are no similar looking kanji which exist in the WaniKani learning system