"The Starlights explain that the enemies have killed Mercury and Jupiter and stolen their power sources, their Sailor crystals. Usagi and her friends wonder if those crystals will be the key to reviving them, so they decide to recover them. The Three Lights show them that, like them, they are also true Sailor Senshi.
The Sailor Animamates, on the other hand, are just imposters. Meanwhile, Usagi begins to have the strange feeling that she has forgotten something important.

Suddenly, when they go to the home of Sailor Mars, she and Venus discover that Phobos and Deimos (Rei's guardians) are being cornered by another Sailor Animamate, Sailor Lead Crow.
It knows Phobos and Deimos because it comes from the same planet. He betrayed the guardian of his world, Sailor Coronis, in exchange for Sailor Galaxia promising him the power of a Sailor Senshi. Lead Crow kills Phobos and Deimos and seizes their star seeds, only to take Sailor Mars hostage until Sailor Moon takes action,
removing it. Then Sailor Galaxia appears by surprise, killing Venus and Mars and stealing their crystals. This makes Usagi remember Mamoru's death at her hands, at the airport, and go into a complete state of shock."