Interestingly, you don't fight anyone's Nahobino forms. Yuzuru is killed by Ichiro and Abdiel following the Qadistu reviving Tiamat at the end of Shinjuku, leading to the main character to fuse with Tsukuyomi instead, as Aogami dies. It's why I had it out for Ichiro and Abdiel. I also think the Qadistu die to revive tiamat by giving her their power. Nuwa dies, meaning Yakumo drops out. Zeus and Odin are a double boss fight, which was annoying to deal with the first few times I tried. At the end of the Temple of Eternity I was glad to fight Abdiel again, even in her fallen form, and I got to put Ichiro down. I can't help but feel a bit bad for him, but he let Mastema corrupt him with power so fuck him. Speaking of Mastema, he's the penultimate boss and he was less difficult than annoying, same with Tiamat. He gets extra turns if you crit or hit his weakness, so the fight is slow.
Aogami comes back after you beat Tiamat, and it was an extremely hype and moving moment for me even though it cost Tsukuyomi his life. Despite how tedious the fight is, I loved that moment a lot.