Jenka is riding aboard Füst when they [ crash] [[Chronology - Volume #|✣ ]] the party at Zumzum, important for plot development because it allows the Jägers to meet Agatha Heterodyne and start getting the idea that maybe she really is the Heterodyne heir that they've been seeking. (Füst doesn't exactly endear himself to the townsfolk on this occasion, but oh well.) He also appears (offstage) later when the Jägers are the first to [ notice] [[Chronology - Volume #|✣ ]] that Mechanicsburg is under attack by the War Stompers under Rudolf Selnikov.