Unless something can be done about Fives' aging (or Jedao manages to somehow, after all this time, get himself killed), he almost certainly will outlive him, even without Jedao's terror of an eternity of solitude and insanity. Even with his aging slowed to normal the odds of him living long in war are... slim. He doesn't want to die, he never has and never will, but when it comes to it his deeply ingrained instinct is to give no thought to his own life if sacrificing it will further his cause.

"I was going to ask for the chips to be removed, then go back and let them execute me," he confesses quietly. Because he couldn't imagine a life without his brothers, and he couldn't imagine any way to have a life with them. You saved him too, Jedao.