Zero Two is the pink-haired heroine of Darling in the Franxx, the anime series that aired in 2018 and built a large international fanbase around its distinctive characters and emotional story. Short greeting lines like ohayo became easy to lift from the show because they are short, clear and instantly tied to her personality. On soundboards and in fan edits, the clip is reused as a friendly morning greeting rather than a dramatic quote, which helps it travel beyond viewers who know the full series. Its charm is in that simplicity, a familiar voice saying good morning.