Does your world have any "Friendly Monsters?"

I'm talking characters or beings who are monstrous in appearance and yet still friendly or kind. They may look dangerous or evil, but are just as nice as any hero. Does your world have anything like that?

I have an example of a "friendly monster" in my setting, her name is Silverwing. She's a princess of a kingdom of bird people who was cursed as a child by a parasitic Shadow Worm. This worm infected her with a rare disease called Shadowscale Syndrome, which caused her skin to turn black and scaly, marked with otherworldly glowing runes. The feathers on her head morphed into black tendrils, and a bizarre stone mask with tribal patterns grew out of her forehead. Silverwing now looks like a strange fusion of a squidlike, shadowy bird monster.

However, Silverwing is actually very friendly despite her warped appearance. She's over 250 years old, as the curse caused her to age very slowly, so she's very wise. However, her unsettling, alien appearance forced her to drop out of her royal duties as Princess of Rytonia and live in a specialized, Shadow Magic-filled castle. When she rarely shows up in public, she wears special, silver armor that conceals much of her true shadow form. Silverwing is proof that darkness doesn't always mean evil. It may be strange, alien and kinds scary, but it's not inherently malicious. It can be kind, even!