Mad Sweeney
(Pablo Schreiber)

Mad Sweeney is a leprechaun. You thought leprechauns were little? That’s just in stories.

“When we meet him, obviously he’s working for Mr. Wednesday,” Schreiber said. “Mad Sweeney’s arc is once he loses his spark, his life force, he spends the rest of the season chasing a woman to get it back, which I think as men we can probably identify with, or whatever romantic interest we’re chasing.”