A mouth that wants peace can call for it. If you don’t have a mouth, you can’t call for peace. So use your mouth and call for peace when you can. Peace is great.
But before you call for peace, you must first placate the masses. To do so, you astound them with your yo-yo (よ) skills. Once they are so entranced by how talented you are with a yo-yo, you easily convince them to make peace.
Currently there are no similar looking kanji which exist in the WaniKani learning system