Sebastian Michaelis is the demon butler in Black Butler, the manga by Yana Toboso that began in 2006 and was adapted into an anime series in 2008. In the story, he serves Ciel Phantomhive while hiding his demonic nature behind perfect manners and wit. Watashi wa is the Japanese phrase for I am, so the clip is often used as the start of an introduction rather than a complete statement. Online, fans reuse short Japanese voice lines like this in edits, reaction videos and cosplay clips, keeping Sebastian a familiar figure in anime meme culture.