- Cliché Storm: This series combines every cliche from a High Fantasy anime (princesses, good and bad princes, evil conquerors, etc.), a Tales Series game, and Magic Music.
- Ham and Cheese: Todd Haberkorn as Ludo in a nutshell. to an extent, Keith Silverstein as Bazra.
- Moral Event Horizon:
- General Bazra crossed it when he killed Rin and Al's grandfather for refusing to hand him over a paper that contained a Spirit Song's letter, and then it's revealed he destroyed Dr. Weisen's lab by sinking it in a lake, leaving all of Weisien's assistants to drown, all in order to obtain the plans for manufacturing the boxes that can store the Spirit Songs.
- Prince Lood was an unlikable Jerkass before, but he crossed it when he forced Finis to use a Spirit Song to obliterate an enemy fortress despite having seen her coughing blood afterwards. And she only complied because Lood threatened to execute Henry if she didn't sing. Then, in Episode 7 he kills Henry's subordinates, dresses him as an enemy soldier and tricks Finis into burning him to death, gloating when Finis realizes what has happened. You know he has gone from a mere Prince Charmless, to a full-blown Evil Prince.
- Unintentionally Unsympathetic: Even though the audience sees how Finis falls from her Trauma Conga Line, and her immortality causing others to shun her, it's still hard to feel completely sympathetic with her wish to destroy the world.
- The Woobie: Finis can qualify. Treated as nothing but a weapon to be used in war, losing her lifespan little by-little with every song and then the man she has come to love gets threatened by her captor.
YMMV / Lost Song