Hard, Fast, Amazing!.The Witches obtain a prototype Jet Striker model from Karlsland. After an argument between Charlotte and Barkhorn, the latter gets to test it out, while the former is convinced by Lucchini not to use it after trying it out herself. Barkhorn relishes the Jet Striker's power and outperforms Charlotte in a series of performance tests, but it ends up draining too much of her magic, causing her to faint mid-flight. Forbidding anyone from using the Striker as a result, Minna 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 Charlotte to push her Striker Unit to its limits to save her, destroying the prototype in the process. Later, Ursula Hartmann, Erica's twin sister and a Striker engineer, sends a shipment of potatoes as a token of apology for the flawed prototype.