Beautiful Singing Voice
A character is noted IN STORY as having a beautiful singing voice, usually a sign of someone who is pure of heart.
I'll work on crafting a good description later. However, I'm having trouble believing we don't have this one. Please let me know if you find it. This is an old trope, and the biggest cause of Love at First Note. The Little Mermaid may be the Trope Codifier, but chances are, the trope itself is Older Than Dirt. Rolling Updates.
Hello, Unknown Troper. You'll need to get known to lend a hand here.