Nightshade is the last of the four "supers" in Semi-Super. More motivated by fun and excitement rather than any moral compass, she is also the stealthiest and more sinister of Semi-Super.
In my last animation I got some complaints as to why the character was doing what he was doing. So I will explain the premise behind this animation.
Nightshade was sent by the team to gather information on a dangerous crime lord. She retreived the information by consuming the soul of one of his lackeys, the act of which also makes her more powerful. Black Suit, the assassin, is hired by the crime lord to protect him against Nightshade. But how effective the protection really is, is up to debate.