Tanikaze Nagate’s grandfather pushed him to become the best pilot he could be, but he could only teach him so much. In order to realize the dream of becoming a true guardian pilot, Nagate had to face real action. The first appearance of a Gauna in a century on his very first sortie obliges.
The Gauna itself is a frightening, implacable hulk of a monster somewhat resembling the Giant Warrior from Nausicaä—not at all a bad thing to imitate—with a medusa-like tangle of tentacle-like protrusions, one off which grabs Yamano Eiko’s frame and swallows her whole, then morphs into a rough approximation of her. Very creepy, dark stuff, though notably lacking in gore, at least in this instance.
Nagate is slammed down early in the battle and would seem to be another casualty, but he gets a somewhat preternatural second wind, picks himself off, and hangs with the Gauna long enough for the others to escape, until a “Heavy Mass Cannon” projectile—essentially a big weight—fired by Sidonia impacts with the Gauma, driving it back, but not killing it. While the mining mission was a bust, the fact they were able to push it back with only one trainee out of eight lost is accepted as a victory.
It’s something else entirely for Nagate. He does well in battle, but not afterwards. The innocence he lost in the battle is on display in flashbacks to the moments before the battle, when the haughty Yamano refuses to shake hands with Nagate and Izana for good luck, which it turns out she could have used. After the battle Nagate definitely showing signs of PTSD, and is unable to keep his food down. He has the skills, but he has yet to build the fortitude, for the trials ahead.
So far the show seems to be punishing arrogance and rewarding meekness: in addition to Yamano’s comeuppance, Kunato is shot down (figuratively) for the second episode in a row, being totally ignored and passed by by Akai, the leader of the Elite Four Guardian Pilots tasked with finishing off the Gauna, who is only interested in Nagate, and why wouldn’t he be? Nagate fought the Gauna head-on. That fact also attracts Midorikawa Yuhata, who has the makings of a Nagate groupie who would wedge between the quiet rivalry brewing between Shizuka and Izana.