When you guard evil, it's normal that you become evil, too. But if you're loyal to your principles and know how to balance your duties and beliefs, you won't have a problem staying on track.
In Greek mythology, Tartarus is the realm of the underworld reserved to punish the wicked as well as imprison the Titans.
Design and skills reference a mythical cyclops, the most famous of which was Polyphemus. Odysseus blinded Polyphemus and told him that his name was "Nobody" or "No one," so that would be who Polyphemus blamed for his blindness. Polyphemus also killed Acis, crushing him with a boulder, while vying for the affections of Galatea.