The Witches discover a huge Neuroi spire whose core is in a location far beyond the altitude that their Striker Units can reach. Formulating a plan using rocket boosters in stages to reach the required altitude, Sanya is chosen to attack the core. Having never needed to use a shield in combat, Eila becomes furious when Yoshika is chosen to protect Sanya instead of her. Eila tries to get Perrine to train her to use shields, but to no avail. Sanya becomes annoyed with Eila's willingness to give up and gets into a fight with her. The next day, as the Witches launch Sanya and Yoshika to the stratosphere, Eila apologizes and expresses her desire to protect Sanya. Seeing this, Yoshika decides to switch places with her. Eila finally uses her shield to protect Sanya as she destroys the core. (thetvdb.com)