when the right part of Agni's face glt cutted and we see him and Luna in the theater, I thought that meant that all the memories that compose Agni himself, as we saw him through all the manga, already died, like his soul is pretty much related to his memories, to his identity. So that would mean Luna already died. Then the other part of Agni, when he loses all his memories, contains his soul or another part of his soul (or the part that already died were just his memories, I already said that what am I even saying lol) kept living until he met Judah again, then both of them hug each other and went to the cinema, meaning they both finally died.
An interesting read, for sure xD