Hyriluk is a supporting character in the anime The Wrong Way to Use Healing Magic. He is a researcher affiliated with the Demon Lord’s army, where his primary function is to create artificial monsters intended for use as weapons of war.

Information about Hyriluk is limited, but what is established portrays him as a figure working behind the scenes of the demonic forces. Referred to by some as a demon mad scientist, his work focuses on the development and creation of powerful, man-made creatures known as magical beasts or magical monsters. He is directly responsible for the creation of a giant serpent that posed a significant threat to the main characters, and his ongoing research aims to produce even stronger monsters for the demon army to use in the conflict against humanity.

His role in the story is that of an antagonist and a creator of threats. Rather than being a front-line combatant, he contributes to the war effort through research and development, designing biological weapons that the demon army can deploy. His creations serve as formidable obstacles that the heroes, including the main character Usato, must overcome. He has also demonstrated awareness of key individuals on the opposing side, such as the human knight Sir Siglis, indicating his involvement in strategic considerations of the conflict.

Due to his limited appearances, there is little publicly available information regarding his personal background, his deeper motivations beyond serving the demon army, his key relationships with other characters, any personal development he may undergo, or a detailed list of his specific abilities beyond the creation of magical monsters.