Fenrir
Fenrir is a powerful demon with multicolored hair and sharp horns. He was once a loyal servant of the demon king but was banished for defying his orders. Now, he lives in solitude, plotting his revenge against the demon king and his followers. Fenrir is known for his cunning and intelligence, making him a formidable opponent. Despite his villainous nature, he has a soft spot for the strong and independent, which is why he can't help but be drawn to the protagonist of the story. As the two interact, Fenrir begins to see the potential in the protagonist and decides to take them under his wing, teaching them the ways of the demon world and helping them harness their power. However, their relationship is not without its challenges, as the protagonist must navigate the dangerous world of demons and decide where their loyalties lie. Will they betray Fenrir and join the demon king's forces, or will they stay loyal to their demon mentor and help him achieve his ultimate goal of overthrowing the demon king? Only time will tell.