Well, You See:
My Idea Involves A Hylian Like Reize Finding A Shrine, While Walking Through It, They Here A Voice Saying Their Body Is Needed, But Their Mind Is Not, Eventually, They Find An Altar Which They Then Realise Is Where The Hero Of Time Eventually Reawakens, So They Understand The Voice, Their Body Is The Vessel, And Their Mind Is Meant To Be A Ghost. So Basically, They Sacrifice Their Mind, So The Hero Can Awaken Again.