This sound is associated with Monkey D. Luffy from the long-running anime and manga series One Piece. Short Luffy voice clips spread widely through anime edits, fan compilations and meme posts because his voice is instantly recognizable even in brief phrases. “Ore wa” is especially useful online because it sounds like the start of an introduction, letting editors cut to a caption, reveal or punchline. It remains popular in anime meme culture thanks to One Piece’s huge global audience and the clip’s simple, flexible timing.