Advocate
noun, verbal noun
The master chanter is the one who is the loudest. He makes sure everyone hears his chants. He's the main advocate.
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.
ベーコンの平和を唱える主唱者にお会いすることはできますか？
Could I meet the leading advocate of Bacon Peace?