The line comes from Fate/Grand Order, the mobile role-playing game where historical and literary figures appear as Servants, and Hans Christian Andersen is a Caster-class Servant known for writing fairy tales such as The Little Mermaid and The Ugly Duckling. His Noble Phantasm, Märchen Meines Lebens, translates roughly as the fairy tale of my life, and it draws on the stories he created. Fans have shared the voice line beyond the game, using it in edits and soundboards to evoke Andersen's storybook power and the game's dramatic battle presentation.