[Spoilers] Disappointed at lack of phasing in storyline

[Delily]

Cloud killed Aerith by drowning her. Aerith was very much alive after she was stabbed. Unfortunately there is no "maybe" the lala is dead. That girl is so beyond dead she turned gray.

For the game theorists out there: Cloud killed Aerith.
https://www.youtube.com/watch?v=tEJ_3_wYROc

She was impaled. by a giant sword. Through the back

As has been pointed out, no one, outside of Teleji, has confirmed Namo's death.