In Rhapsody (of Fire)'s musically told-fantasy-epic, the Algalord Saga, Akron the Black King, prone to ravaging every proverbial puppy in the story is served loyally by The Dragon Dargor, a fearless and honourable half-demon warrior prince, who is apparently so awesome as to warrant an entire song of his own (with two variations!). All of this is a fairly transparent foreshadowing of Dargor's Heel-Face Turn at the climax of the story. And HOW!
Cyborg Noodle acts as one to Murdoc in the Gorillaz canon.
Nikki acts as this for Doctor X in Queensrˇche's Operation:Mindcrime.