The Lady Sybil was a member of the Imperial Guard, a multi-special group of super-powered alien beings who acted as enforcers of the laws of the Shi'ar Empire.
Featured in these Comics
Other Personas of Sybil
History
As Oracle, she was amongst the first of the Imperial Guard encountered by the team of superhuman mutant adventurers known as the X-Men who sought to rescue the Princess-Majestrix Lilandra from her insane brother, then-Majesty D'Ken. Following the orders of their emperor, the Guard clashed with the X-Men and were on the verge of winning when the band of interstellar freebooters known as the Starjammers arrived to turn the tide of battle in the X-Men's favor.