Jun 11, 2022
After a broken neck, there may be up to two minutes of awareness before a lack of oxygen leads the patient to suffocate and consciousness. Permanent brain failure occurs only a few minutes after.
During those two minutes, Nanami Hoshii would have been in extreme pain and completely unable to communicate whatsoever due to the lack of air.
In the text, Melo is said to have pushed Nanami Hoshii off a cliff within the span of 'a few minutes.' Thus, I conclude there is a solid possibility Nanami Hoshii may have been conscious and aware when he was thrust into the ocean, ultimately dying via drowning.