Honkai: Star Rail: The Emperor Hero Starts by Raising Firefly

“I will set the sea ablaze!” As a flaming meteor plunged into the ocean, a life came to an end. The Glamoth Empire had stood in the Asdana Galaxy for tens of thousands of years. Now it faced the threats of natural disasters and an insect invasion. As the Son of Light and a summoner of the Light and Shadow Armor, the displaced Chen Xing wound up on this planet, which was on the brink of destruction. He found a girl by the sea. Her name was “Firefly,” and she was a biological weapon created by the Glamoth Empire: a Glamoth Iron Cavalry soldier. In Firefly, Chen Xing saw his former self. A frail body harboring great power, burdened with the duty of protection, with nothing but darkness ahead. “Since I saved you, from today on, your life... belongs to me.” Chen Xing lifted the girl's chin and declared this to her. Firefly gazed straight into Chen Xing's eyes, pure and unflinching, without a word of protest. Ever since that night, when she had watched the man before her stand in her defense and become a light that drove away the swarming insect fleet, he had become the sun in her heart!