Enmity is one of the Seven Friendless, considered children of Eternity.  She has taken the form of a young child, and often enjoys creating chaos.  She merged the energies of all the unappreciated minions of villains into a gestalt being, Unum, and had her battle the Lady Liberators and the Guardians of the Galaxy.  She-Hulk was able to convince Unum that Enmity was doing this of her own pleasure, which caused Unum to betray her creator, impaling Enmity with her weapon.  Enmity, enraged, destroyed Unum and left. 

Creation

Enmity was created by Peter David and Muhmud A. Asrar in 2008 and first appeared in She-Hulk: Cosmic Collision # 1.