When Neon Genesis shows up at Yuuta, Rikka and Shou’s school—with outside shoes—and risks being reported or escorted away, you know something big is brewing. Akane has dusted off the first kaiju she built to defeat Gridman and souped it up into a kind of mega-mecha-kaiju.
She’s also not shy about her role in the kaiju-making. Assuming Yuuta has caught Rikka and Shou up, she tells them upfront that she designed her latest kaiju especially to attack the school’s cultural festival. If they don’t like it, well, they’re just going to have to try and stop her…if they can.
How to proceed creates a rift in the “Gridman Alliance”, which I only put in quotes because in the midst of said rift Rikka calls into question whether it’s an alliance at all, since only Shou has been insisting that’s what they are. Shou thinks they need to fight at all costs, but Rikka is far more hesitant—Akane is her friend; she doesn’t want to fight her friend.
When Shou accuses her of letting her emotions rule, Rikka wordlessly stalks away, and Shou knows he’s stepped in it. At school, Yuuta and Shou again try to get through to Akane, asking if she’ll have the battle somewhere else where their classmates won’t get hurt. But Akane hates the festival, and suspects the two of them wouldn’t mind if it were interrupted by a cool kaiju battle. There’s nothing left to say; she ain’t budging from her plans.
Back at the junk store an extremely hungry, one-eyed Anti shows up looking for Rikka…then passes out. Rikka’s mom feeds him and he goes on his way without incident.
In one of the more unsettling scenes of the entire show, Rikka is alone on a bus with Akane, hoping to change her mind about attacking. But Akane hugs her from behind, lauding her for being such “a good girl,” and assuring her no matter what she does, Rikka will never hate her, because she’s been “set up from the start” to like Akane like everyone else in the city.
Akane is convinced she is a god and there’s no one to prove otherwise, even though I wonder how far she’d get without Alexis’ help. Rikka leaves the bus, no doubt creeped out at the prospect of having been born programmed to be Akane’s friend.
She meets with Yuuta and reveals another reason she’s so upset about the whole situation: she feels she hasn’t contributed anything to the Gridman Alliance. All she feels she’s done is be related to the people who own the junk store and computer. But Yuuta tells her she’s wrong: she has contributed vital moral support throughout this whole ordeal.
Yuuta draws courage and strength knowing she and Shou are cheering him and Gridman on. Sadly, when Yuuta tries to use the opportunity to say more about how he feels personally towards her, she interrupts by saying she’ll apologize to Shou tomorrow, saying it would be folly to think Shou would apologize first.
Her mention of “going first” illuminates a light bulb in Yuuta’s head, and suddenly he has the right plan for the festival: Gridman will invade the school first, forcing an evacuation before Akane can mobilize her kaiju. He also has Gridman summoned at only half-size in order to allow all the Neon Genesis to sortie at once and combine to form Full Combo Gridman, who is of a size with Akane’s mega-mecha-kaiju.
The ensuing battle takes place outside of the school, leaving the festival untouched, which Akane is very upset about, in addition to being outmaneuvered when Gridman appeared first, the opposite of how it’s always gone.
More frustratingly for her, even her new upgraded kaiju isn’t much of a match for the Combo Gridman, who pulls of its head, launches it into the stratosphere, tosses it down to the earth, then cleaves it with a gold-plated finishing move.
In the midst of the battle both Rikka and Shou are by the computer, watching and cheering Yuuta on as usual, and that’s how they get over their previous rift. After all, they all tried their best to dissuade Akane and she simply wouldn’t listen. Friend or not, her attack had to be stopped lest more people die.
After the battle the three participate in their class’ “reverse gender cosplay cafe”, resulting in Maid Shou apologizing to Sea Captain Rikka while a pleased Schoolgirl Yuuta looks on.
As for Akane, who was so sure that this time she’d win and that she couldn’t lose, stays home, lying on the floor of her filthy house, in the dark…a fallen god. Maybe she’s just done with this…one can only endure so many defeats until it’s just not fun anymore.
Alexis isn’t mean or anything, but he’s very firm in his belief that she can “do better” than this. However she feels here and now, Alexis isn’t done with her, and intends to keep relying on her inimitable “talents.” More and more it’s looking like it’s ultimately not the city that must be saved from Akane’s kaiju, but Akane who needs to be saved from Alexis.