Blue fire

In the depths of hell, a demon girl created a new type of fire, a blue one, which she called Blue Fire. She changed all the fire in hell to blue, much to the displeasure of the other demons. They confronted her, but she didn't care. When they threatened to beat her up, she laughed and said she would defeat them before they could even apologize.

Lico, the leader of the Demon King's top army, challenged her. The demon girl, wielding the King Slayer sword, tried to strike him, but Lico, one of the fastest demons in hell, dodged her attack. He was about to use Demon Light when the Demon King, Transter, intervened with a plan. He proposed a fight between the demon girl and Lico, with the winner becoming the ruler of Planet Slayer for two weeks.

Lico trained hard, honing his claws, while the demon girl perfected her Blue Fire technique. Even the Demon King trained with her briefly before deciding it was too dangerous. Lico developed a technique called Sun Copy, which could mimic the sun's fire and speed.

On the day of the fight, the arena was packed with demons. The demon girl and Lico stepped into the circle. The fight began with the demon girl using her black fire to try and blind Lico, but he was too fast. She kicked him into the hellfire, injuring him, but he retaliated with Sun Copy, slapping her five times in a second.

The demon girl then used her red fire, increasing her strength tenfold, and kicked Lico with immense force. Lico, growing stronger and faster due to Sun Copy, used his demon fire, transforming it into sun fire, and shot it at her. She was severely injured, bleeding on the ground, and close to passing out. In a final move, she used her Blue Fire on Lico, nearly killing him and securing her victory.

Everyone, including the Demon King, was shocked. They had witnessed a fire born of love and hard work. The demon girl became a good queen, earning the nickname Baby Girl.