Not every anime ending is created equal. Through a series of common mistakes, many endings have all but ruined the story.
Note that an ending doesn’t always have to conclusively end the story ... dying as the symbol of evil so the world can move towards true peace. And while the anime’s sequel, Code Geass ...
The ending symbolizes adult Naomi's sacrifice, leaving fans to interpret if he truly perished or transformed. The 2019 anime film Hello World is an ... is not a definitive end but a transformation.