This story was really interesting. I found the world reminding me of Mobile Suit Gundam and Darling of the Franxx. I loved Sona and Eris. It was cute seeing Sona rediscover her feelings after being treated like a killing machine for so long. I also like how Eris was staying true to her personal values all the way through the story. I had some gripes with certain character's (*COUGH COUGH* MILO *COUGH COUGH*) which I mean I understand that they have valid reasons for being against Pilots since they are literal unfeeling killing machines, but the way they were talking to Sona made me so angry. The story was nice and I am interesting in the sequel based on the ending of this book. The only thing I would say that made me confused while reading was the process of how Sona hooked up to the Valkyrie. It might be just me, but I could not visual how Sona connected with the machine in order to control it. Other than that I really enjoyed this book and hope to read it's sequel in the future.