Borderlands 2: Professor Nakayama
Professor Nakayama is the main villain in Sir Hammerlock's Big Game Hunt DLC
He is a mad scientist who has this weird obsession with Handsome Jack and strives to be everything that Jack is.
He is also known as the "Hyperion's Scourge", and as the person who poisoned Atlas's CEO.
Sir Hammerlock keeps ignoring Nakayama and treating him like he is no real threat, which in turn makes Nakayama more and more furious, since he is seeking attention, and both you and Hammerlock act as if you don't really care about him and just want to go on with your hunting trip.