Calvin "Cal" Zabo / Johnson

Calvin "Cal" Zabo, born Calvin L. Johnson, is a medical doctor of ambiguous morality. After being violently separated from his gifted wife and baby daughter by HYDRA and S.H.I.E.L.D., he started a quest to avenge his wife's "death" and find his daughter, committing numerous crimes that have caused others to consider him to be a monster. During this time, Zabo developed a formula that gave him enhanced strength. However, the side effects of the unstable formula gave Zabo an erratic personality and severe issues controlling his emotions, particularly anger.