The Mighty Fall | Percy Jackson Headcanon Thing

We all know the end of Mark Of Athena, right? But what if they didn't fall together? What if Percy was too late to save Annabeth? What if... she died? Would Percy be able to cope? Or would he soon end up joining her in Death? 【Very loosely based off of a Tumblr headcanon, I don't know what user made it so unfortunatel...