Apasea

Apasea is congenitally aphasic. People with aphasia have difficulty writing, including conversations, but they can sing because they use a different part of the brain.
Apasea Although she can only pronounce one word, "ah," she can sing hymns with a beautiful voice, and the church later accepts Apasea as a nun because they think they can use her tragic but beautiful voice for propaganda.
Although Apasea became a nun due to a dirty plot by the higher-ups, she hasn't lost the integrity of her soul and firmly believes that the world is beautiful.