Famine or "Hunger" is one of the Four Horsemen of the Apocalypse. He is the second to appear of the four, alongside him are his as well notable brothers- War, Death and Pestilence. He has an undying urge to eat, eat and eat (hence why he's called "Hunger" as well)
What he can do is pretty much devour anything- living, dead, human, supernatural, you name it; as well as amplify a victim's craving or desires, making them ravaging for what they can get their hands on. And according to the episode, he can as well perceive a person's soul or look into it.
v That's what he looks like and he was introduced in Season five's 'My Blood Valentine'
