Act 30 Infinity 4 Haruka & Michiru - Sailor Uranus & Sailor Neptune -

Sailor Uranus and Sailor Neptune finally show themselves plainly to the other guardians. As Chibiusa and Mamoru mold a clay Holy Grail for a school project, Ami is drawn into a fight against Yui Bidou, the honor student who is secretly Viluy of the Witches 5.

Chibiusa remembers that Neptune once asked her to mirror a talisman, the very object the group was told to seek in their shared vision. Neptune and Uranus declare they have no wish to fight alongside the others, strike at them, and slip away. Luna afterward explains that the two, like Pluto, were meant to stay unknown, guarding the others from afar. Chibiusa throws herself into a clay assignment, hoping to recreate the Holy Grail that once made Neo-Queen Serenity stronger, while Ami visits Mugen Cram School and meets Yui Bidou, the only student ever to outscore her, who proudly shows off a miniature Tau Nebula.

Watching Ami in her fountain, Kaolinite senses a formidable power and concludes the girl must be a guardian, so she sends Yui, secretly Viluy, after her. Michiru and Haruka trail Ami to a laboratory lined with caged Daimons, where students under Viluy's control attack, and Viluy reveals she uses nanobots to extract Hoste. Ami tears free and becomes Sailor Mercury, Haruka and Michiru break loose as well, and all three flee. When Viluy corners Mercury with her nanobots, the rest of the team arrives; Haruka and Michiru transform into Uranus and Neptune, and Uranus summons her talisman, the Space Sword, striking Viluy down and saving Mercury. Far away at KO University, Motoki is introduced to Reika's new acquaintance, Setsuna Meiou.

The chapter debuts Setsuna Meiou and Viluy, along with the Uranus Planet Power and Neptune Planet Power henshin phrases. The Space Sword appears for the first time, as do the Mosaic Buster, Mercury Aqua Mirage, and Space Sword Blaster attacks.