Ennis is a protagonist in the light novel and anime series Baccano!. She is a homonculus created by the immortal scientist Szilard Quates. She served as his slave until she was saved by Firo Prochainezo, who fell in love with her at first sight and would eventually become her husband. She is also a good friend of Isaac Dian & Miria Harvent, describing them as the brother and sister she never got to meet. She is voiced by Sanae Kobayashi in the Japanese version of the anime and Brina Palencia in the English version.