Saving My Beloved from a World on the Brink of Destruction

I was heartbroken upon learning that the world inhabited by my favorite characters from a novel was heading towards destruction. Suddenly, I found myself possessed, transported into that very realm.
While I might be able to bear the sight of my own demise, I simply cannot endure watching my beloved perish. Elric, a mage at once infinitely lighthearted yet profoundly burdened, shall now strive to save this world from its impending apocalypse, aided by the body I’ve come to possess.
Oh, and indulging in fandom activities? That’s just a bonus.