[Oh he understands. He's understood about death since he was 7. He's faced Death head on too, and died in the process. But even then, he didn't simply disappear right away. He still hung on, wanting to fulfill the final promise with SEES, and to this day he still believes, it was worth it.]

Like I said, whether he lives or not depends on his own will.

Life passes on, and there's no ultimate avoiding of the end. But it's up to each individual how they want to pass on. No one can make that decision for us, and we shouldn't decide that for him either. Otherwise, what would his life have meant?