Mars made her debut appearance in Losing Its Lustrous!. She, along with Saturn attempted to steal the Lustrous Orb from the Celestic Town museum. She also appeared in Double Team Turnover! where she informed Cyrus that the Red Chain project is nearing completion.

Mars appeared again in Steeling Peace of Mind! along with her Purugly. She had brought the Spear Key to Iron Island where she activated the ruins in the island to find the exact location of the Spear Pillar in Mt. Coronet. After failing to complete the task in Saving the World From Ruins!, she attempted to blow up the island on Cyrus's orders but she failed due to Riley and his Lucario.

She later appeared in The Needs of the Three! and The Battle Finale of Legend!. After the disappearance of Cyrus, she became distraught and even tried following him, but was stopped by Saturn. The duo, along with Jupiter, were later arrested.