Moira au Grimmus is the Chief Politico of Sovereign Octavia au Lune. She is the daughter of the Ash Lord and sister of Aja au Grimmus.

In Morning Star, she was part of a team of Gold negotiators sent by Octavia to Quicksilver's home to arrange a coup against The Jackal's brutal reign as the Martian ArchGovernor. However, her team was ambushed by Darrow's forces and she was brutally murdered as a result.

Her name may be derived from the Moirae, a trio of goddesses that determine human fate.