Sidonia sticks to its strengths—intricate space battles, mayhem, and impending doom, not comedy and romance—with an episode-long epic battle of adernaline-pumping perfection. G550 is gunnin’ for Sidonia, literally. Its kill or be killed, and the episode never lets you forget how thin the line is between life and death.
Tsumugi uses her man-made kabi claws to bust out of the trap the first wave of Gauna built around her, and in the process she seems to glean the Gauna’s intent for the humans, including her friends. Whether it was just another Gauna biological reflex in response to external stimuli, or a conscious, sentient effort to provoke Tsumugi, she reacts badly, disobeying everyone’s orders and going on a destructive rampage of every Gauna in sight, despite being heavily damaged herself.
The deus ex machina has a screw loose, and it informs the overarching peril of the situation rather nicely. What ultimately finally stops her attacks is when Izana tries to go after her and calm her down, and gets heavily damaged in the process. It’s been a little while since pilots I actually knew and cared about turned red on the CIC board, so when it’s Izana’s turn my heart sank into my stomach. Thankfully, Tsumugi gets to Izana and agrees to retreat for now, for her sake.
The Guardes manage to take out the second wave of Gauna without Tsumugi’s help thanks to a shift to long-range tactics, and then enter ring formation to destroy G550’s core. But even this tactic backfires, as the equatorial trench they create is the perfect aperture for a massive Hyggs cannon the surviving Gauna fuse into.
Sidonia is huge and slow, so I knew any beam launched at her would have to be somehow prevented outright, blocked, shifted, or absorbed by someone. In another case of the computer displays creating visceral reactions, the amount of red the damage analysis predicts makes it clear if none of those above things happen, it’s Game Over.
Tsumugi manages to deflect the beam enough so it misses Sidonia, but only by a few hundred meters to starboard. At this distance, the mere force emanating from the beam is enough to nearly shake Sidonia to pieces, and alarmingly, all the CIC displays go to static as the shock hits, and it was all I could do to pray those displays wouldn’t go dark, and that breaches wouldn’t occur.
With G550 charging for another salvo, and both Tsumugi and Izana unaccounted for, Nagate decides to rush in headlong and uses his engine pack as a precision projectile, causing a Death Star-style chain reaction that brings that sweet, sweet sound of Bubble Desintegration. Once again, Nagate one-ups Kunato and emerges the hero.
It’s a costly victory: Nagate and Izana are both found, but Tsumugi is in tatters, and Izana fears she’s dead. They didn’t lose a lot of Guardes, and Sidonia wasn’t seriously damaged and didn’t need to carry out emergency maneuvers, but with Tsumugi’s fate unclear and the Gauna stronger than ever, it’s no longer simply “nice” to have Chimera on their side; it now appears absolutely essential for the battles to come.