I'm the One Who Died, but the Hero Went Crazy

As the hero's comrade, I died after blocking him from the evil dragon's breath. Well, it's fine. The Hero Elkinas was the only friend I trusted to have my back. I'll go out with a bang, I guess, so the hero can marry a pretty woman and live the rest of his life. …Is what I thought would happen, but after 80 years passed, I came back to life in a completely different body. And… “It’s regrettable, Arlene. Elkinas went insane. Completely insane.” That was the first thing I heard. What else could I do? I should help him. To help my close friend who seems to have not been able to accept my death, I decided to stay by his side while hiding my identity. This way Elkinas could completely accept the past and become happy, since this is the very reason why I died for him. But… I think he recognized me. "You're… Arlene, aren't you?" I touched my face. I definitely don't look like Arlene. Shouldn't there be no way he could know who I was? "I won't ever let you go… Ever," Elkinas said with shining eyes. --- Happy to die for the sake of her friends, Aryn the sorcerer succumbs to the poisonous breath of the evil dragon Kuntern. 80 years later, through the divine powers of The World Tree and her former adventuring companion Zephyr, Aryn finds herself reborn. Upon her awakening, she learns that her childhood best friend, Elkinas Pontiac, went insane after her death. Once the leader of their expedition, El is now a tyrant ruler, raising a child hatched from Kuntern’s egg. Will Aryn be able to save him?