Mecha Peko comes from the world of Usada Pekora, the rabbit eared VTuber from Hololive Production who debuted in 2019 as part of Hololive Fantasy. Pekora is known for ending sentences with peko, a tic tied to her rabbit character that fans instantly associate with her chaotic, playful streams. Short clips of her voice are widely remixed by fans into robotic, distorted and soundboard versions. The mecha variant keeps that recognisable delivery but makes it sound artificial, which is why it continues to circulate in anime and VTuber meme edits.