Tamming his Luna spirit:Love interwing

It seems like a heart-wrenching tale. He pursued me relentlessly, even after I betrayed him, despite his dark nature – though I must admit, he was more than that, a devil perhaps, but also someone I once cared for deeply. It all happened when my fiancé proposed, and my heart was torn between two people. At first, he was charming, luring me in, but now, as I'm about to marry another, I realize the monster he's become. I cannot, and I refuse to be with him anymore. Despite his determination to have me at any cost, I'll keep escaping, even if it means risking everything. "I won't give in just yet! I'd rather face death than submit to his desires." Who is this enigmatic figure?