Beef

Beef, real name Steven Walkerton, was raised as the twin brother of David Walkerton. (However, he was really the son of John and Martha Walters, switched at birth with Sal by Linda Walkerton.) Beef grew up to become a man of muscle and few words, playing football in high school and joining SEMME, presumably at the same time as Walky. Beef was part of Squadron 128, but was later transferred to Squadron 135 after the Year Zero incident.

Unfortunately for Beef, his ties to his brother and family weakened when Sal came to know her brother and real parents. Eventually, he grew disgruntled, and became an agent for Dargon Chesterfield's organization. In the final battle with Chesterfield's organization, Beef turned on his comrades, revealing his treachery. As the physically strongest member of SEMME, Beef was nearly unbeatable, singlehandedly killing several members of the group- until he was shot dead by a hurt and angry Daisy.