Inferno, or Infernal Pit, is the result of what would have happened if Pit stood in front of the Mirror of Truth like a deer in the headlights for just a couple more seconds. He's still incomplete, but he's very mutated and is missing several parts of Pit's personality. Unlike Dark Pit, he plays a more villainous role and has a lawful evil alignment as opposed to chaotic neutral. He has dark blue hair, tanned skin, red eyes (oh goodie), sharp black feathers, and clothes that consist of the colors red, black, and gold.
Unless he's joking around and teasing, Fernie always keeps a promise no matter what and stays loyal to those he's close to. Despite having a malicious, sadistic personality, he can develop strong bonds with those he meets (as long as they don't question the Underworld, of course!).
Above his layer of evil, Inferno is silly, mischievous, and flirty towards almost everyone he meets. He tends to flirt with girls the most, and flirts with guys as a joke. Despite having this trait, Inferno is actually rather innocent and has no idea what the hell sex is or what any sexual references mean. In other words, he's a naive flirt.
On top of that, he tends to prank almost everyone he meets, too. Whenever he gets the perfect opportunity, he'll set up something stupid to piss someone off and laugh at their reactions. It may be a simple, innocent prank, or one that'll leave someone boiling with anger. Speaking of which, Inferno has a tendency to play with and manipulate others' emotions for his own entertainment and enjoyment. He is interested in seeing what makes others' the most angry, most afraid, etc., and isn't reluctant to take his "research" a little further.
Most people suspect that this guy is just an innocent, silly angel that wants nothing but fun; however, their views immediately change when they see him pissed. As mentioned before, questioning or violating the Underworld's plans is a subject that really gets on his nerves. He won't gruesomely snap someone's neck or twist their limbs off unless they talk shit about Hades or the Underworld. Don't do it, and you'll be fine!