Lucius Blaine is the temporary partner of Elliot Stabler after Detective Olivia Benson temporarily transfers. He is a detective who often likes to bend the rules to his own liking, much to Stabler and Captain Cragen's dissatisfaction.
His relationship with Stabler was a rocky one, with Blaine often making cruel and unnecessary comments towards Stabler, particularly about Benson and Stabler's family, which resulted in him and Stabler fighting, even physically at one point. They eventually worked together towards the end of a case involving an overweight teenage boy being bullied. (SVU: "Fat")