第 4 集: 小林下令緊急迴避，赤井小隊陣亡引發Gauna碰撞，並展開Kabizashi回收行動。

After killing the members of the Akai squad, the Gauna proceeds en route of collision with Sidonia and Captain Kobayashi orders an emergency evasive maneuver by accelerating diagonally at level 5. This causes massive casualties in the ship's residential area, despite the citizens' efforts to brace themselves. As the Gauna makes a turn back to target the ship again, Kobayashi orders dozens of guardians to defend it, and sends Kunato, Shizuka, En Honoka, and Nagate to salvage one of the weapons used by the KIA squad to fight the Gauna: the Kabizashi. However, just as Nagate's team retrieves the artifact, Gauna 487 turns it's attention to them and fires a Heigus particle cannon with a Hegius accelerator that incapacitates all their units, except for Nagate's Tsugumori. Shizuka's unit goes out of control forcing her to bail out and instead of following his orders to tow the other two guardians back, Nagate grabs the Kabizashi and fights the Gauna head on, destroying it with certain ease. As the others celebrate his feat, Nagate disobeys orders once more and leaves in search for Shizuka, despite being warned that he is distancing himself from Sidonia to a point of no return. (Source: Wikipedia)

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