Board Thread:General Discussion/@comment-25014849-20140627232456/@comment-25780513-20150514110144

Percy and Annabeth survived Tartarus, which means extreme physical and emotional strength. Personally, I don't think most of the other people on the list could have done that. Of course, they had each other, so they were a lot better off than Nico when he fell in, but still, Tartarus nearly drove two (or three) of the strongest demigods in existence insane. Probably no one else on the list could have survived Tartarus's monsters and stupid rivers.