Well I didn't know, I just vaguely remembered hearing it at some point, so it could have been a false memory or someone lying!
It's just weird to me that he used all his energy for that attack but managed to survive so long afterwards. It's supposedly because he wanted to hold out too fulfill the promise of meeting on the roof but he dies before everyone even gets there. Also, Ryoji says something like you'll all go back to your normal lives, him too. and then Aigis is going on and on about being with him, protecting him, etc. How is she going to protect him if he's dead? lol and then the in the end everyone is all smiles and there's no reaction to him being dead at all. It's just very weird to me and I never would have assumed he was dead based on that ending
---
MZero, to the extreme https://www.twitch.tv/kabazame