The origin of this clip is unknown. It was uploaded to a user-generated soundboard under an anime and manga tag with the one-word description 'oskar' and no confirmed source work, character, or year attached, so it is best treated as an original meme upload rather than a quote from a known show. 'Den Tredje' is a Scandinavian phrase meaning 'the third', a suffix that adds mock nobility to an ordinary name. That fake-regal framing is why meme editors keep using it: it turns any reveal, credit, or introduction into a tiny coronation.