Darling in the Franxx is a 2018 anime in which Zero Two, codenamed 002, partners with Hiro, codenamed 016, to pilot the Franxx mecha. Throughout the series she calls him darling, and the affectionate nickname became one of her most recognisable traits among fans. Short clips of the line spread through anime edits, soundboards and reaction videos, where the stretched delivery works as a joke even for viewers who have not seen every episode. Its popularity endures because it instantly signals playful affection, teasing and anime romance in a single word.