The world turned into a real world thanks to Gridman's Fixer Beam.
Ako and Ramo weren't real friends to Akane. The only repli-compoid that she actually came to feel affection for was Rikka.
In the end, what truly saved Akane wasn't Gridman or Yuta, it was her friendship with Rikka. Despite it starting as a fake friendship created by Akane, the feelings became real.
The person that woke up in the end was Akane. The actress is a secret but it was someone suggested by the Tsuburaya producer.
Amemiya can see why people would consider Akane and Rikka's relationship yuri, but Gridman was written as a story of communication and friendship.
What would Amemiya do if SSSS.Gridman got a sequel? He isn't sure, but he has ideas about a story in which the normal problems of the everyday life were represented as kaijuu and Gridman.
If Gridman had more episodes (2 cours or more) he would have made somes episodes exclusively about the Assist Weapons.
In Amemiya's opinion, the most romantic traditional "men-woman" relationship in Gridman was Akane and Anti's.
Amemiya really wants to work with the same staff (character designer Sakamoto/writer Hasegawa) again