Diamanda Nero is a Marvel Comics supervillain created by John Francis Moore and Pascal Alixe. She debuted appeared in the first issue of the mini-series X-Men: Phoenix, which depicts the early battles of Rachel Summers after arriving to the Askani timeline. In this future, Nero serves as Apocalypse's second-in-command and the ruler of his empire while the mutant overlord hibernates due to his extremely advanced age.