Kenny Ackerman, the leader of the gang mafia only had Levi as his one last family that he treasures and care a lot. His age was about 5 when his mother died of an illness, Kenny then decided to take care of Levi as his own, taught him everything that he should know, provide him whatever he needs, even tend to nurse him when he get sick. But, being a gang mafia leader, Kenny tend to make more enemies than friends. Some of them was Erwin of the Wisdom Wings, Erwin was rather smart to move for Kenny's weakness than to face him face to face. Not many knew this, but Kenny has always being protective to Levi. He went insanely furious when Levi was caught in the hands of the Wisdom Wings.