The Witches obtain a prototype Jet Striker model from Karlsland. After an argument between Shirley and Barkhorn, Barkhorn gets to use it, as Lucchini convinces Shirley not to use it after trying it herself. Barkhorn relishes in the Jet Striker's power and outperforms Shirley in a series of performance tests, but it ends up draining too much of her magic, causing her to faint midflight. Minna prohibits anyone from using the Striker as a result, and confines Barkhorn to her quarters. She breaks the ban anyway when a fast Neuroi appears. Although she defeats the Neuroi, Barkhorn faints as, this time, the Jet Striker goes out of control, forcing Shirley to push her Striker Unit to its limits to save her, destroying the prototype in the process. Later, Erica's twin sister, Ursula, pays them a visit, with a shipment of potatoes as a token of apology for the flawed prototype. (thetvdb.com)