Invasion from Space! Seiren Comes Flying In

Galaxia's new Sailor Soldiers, Sailor Aluminum Seiren and Sailor Lead Crow, take up Sailor Iron Mouse's task. Usagi finds a strange little girl, whom she tries to talk with. The girl, who apparently can only say "Chibi", then runs off. She later appears at Usagi's home, Ikuko-mama now declaring her Usagi's sister. After a search for a lost Chibi Chibi, Sailor Aluminum Seiren changes a chief of police into a Phage. Usagi and Setsuna now have to face this new enemy.