Vala is a character that is mentioned in the world created by what English author?
Vala (Middle-earth):  They are mentioned in "The Lord of the Rings", but were developed earlier in material published posthumously in "The Silmarillion" and "The History of Middle-earth". The Lord of the Rings: The Lord of the Rings is an epic high fantasy novel written by English author and scholar J. R. R. Tolkien.
J. R. R. Tolkien