For a bit of random information on who actually survived caution spoilers ahead.


A random note being none of the pilots were shown from the first series in the flash forward that wasn't Tieria standing with Louise either. Apparently according to the credits its a completely different character voiced by the same person who does Hitsugaya's voice in Bleach. So basically its also likely a actual woman this time.

Also purely on speculation it seems that Setsuna has a future as a AI to Gundam 00 based on his speech in the end and him being killed off thats the only thing I can think of that would warrant his death because his true goal was always to be exactly that a Gundam.