Rentaro, Kagetane and Kohina reach the Gastrea nest where Pleiades is located and both Rentaro and Kagetane strike Pleiades' weak point, killing it. After evading pursue by a horde of Gastrea led by Aldebaran and returning to the camp, Rentaro informs Seitenshi of Pleiades' death, and she orders some jets to bomb the Gastrea attacking the base including Aldebaran, who regenerates even after its head is destroyed, just like Gado informed him. After the battle, Rentaro is reunited with Enju and the others, but is also informed that Gado was killed in the occasion and as the top ranked officer remaining, he is now in charge of the Adjuvant forces. Some troops surround Kagetane and Kohina, accusing them of killing a pair previously, and Kagetane confirms it, affirming that they just responded a challenge to a fight. Rentaro stops the troops from fighting them in retribution for his assistance, but is later informed by Shoma that Midori was attacked during the fight and as a result, her corrosion rate is past the point of no return. Rentaro then visits the bedridden Midori and after talking to her, she leaves claiming she needs to go to the toilet, but flees instead. Rentaro and Shoma's search for her lead them to find Midori already dead after she commited suicide and Shoma regrets not being by her side in her final moments. Returning to base, Rentaro wears Gado's coat and introduces himself to the others as their newest commander. When one of the soldiers deny his authority, he stabs him instead and both Kagetane and Kohina step in to protect him from an Initiator who attacks him in sequence. After the reunion, Gado's partner Asaka Mibu confronts Rentaro for being so rough on the others and when he berates Gado in front of her for his failures, she draws her sword to attack him, when Shoma stops her and convinces her to be his partner at least until the war is over. To formulate a plan to defeat Aldebaran, Rentaro asks for Miori's help, despite Kisara's protests, and Miori presents him with a powerful weapon, the Ekpyrotic bomb, certain that it might destroy it, but for the explosive to work, Rentaro must introduce it inside Aldebaran's body and detonate it after its regeneration to ensure that it destroys the Gastrea from within. Rentaro decides to set a final defense line at the Flames of Revolution memorial site using a set of spotlights to locate Aldebaran as fast as possible when its swarm of Gastrea attacks, and in the occasion, Rentaro conforts Enju as the scenario brings her sad memories as the last time she visited it was with her fellow Cursed Children who were recently killed. Now accompained by a powerful force composed of Enju, Kisara, Tina, Shoma, Asaka, Kagetane, Kohina and the Katagiri siblings, Rentaro is certain that they have a chance of victory. However, the set of batteries promised by the JSDF to power the lights are yet to arrive as the operation is about to begin and elsewhere, Takuto is seen disposing of them in revenge against Rentaro for causing his downfall.