Did she ever sing? No. She never sang a single song.
Did she ever use a Symphogear? No. The only Relics she ever used were the Nehushtan Armor and Solomon's Cane, which, due to their status as complete Relics, were automatically exempt from being Symphogear.
I removed those categories from her page, but I sincerely want to know what possessed someone to add them in the first place! It makes absolutely no sense!