Petz

ペッツ

Petz (known as Prizma in English releases) is the eldest of the four sisters. In the anime, she possesses the magical ability "Dark thunder," although the manga only depicts her using a tornado, which parallels Sailor Jupiter's Flower Hurricane. She is named after the mineral petzite and serves as the counterpart to Makoto Kino.
In the manga, Petz is assigned "Code003 Operation Re-new." She and her UFO release viruses over Tokyo to infect the populace. Makoto is infected by one of these viruses and collapses in her apartment. Upon waking, she finds her double attempting to strangle her; she transforms into Sailor Jupiter and attacks the entity, revealing it to be a droid. Petz then arrives in her UFO, expressing amusement that Jupiter survived, before swearing vengeance for her two deceased sisters. Petz and Jupiter engage in combat, but Petz traps Jupiter inside a tornado summoned with the Black Crystal. While watching Jupiter in the vortex, Petz fails to notice the arrival of Sailor Moon and Sailor Venus. She is killed from behind by Moon Princess Halation, although Rubeus still succeeds in kidnapping Jupiter.
In the anime, Petz frequently clashes with Calaveras, yet most of their operations ultimately involve them working together. She is highly proud and willing to trample others to achieve personal glory and power. She also appears bitter regarding a past relationship and reacts strongly when Calaveras teases her about it. Following the betrayal of Cooan and Berthier, Rubeus gives her a stick that infinitely amplifies her dark powers, instructing her to use it to kill both the Sailor Senshi and her fallen sisters. He warns her that failure will result in her not being allowed to return. The stick dramatically boosts Petz's powers and corrupts her personality, allowing her to quickly gain the upper hand against the Sailor Senshi. She then turns on Calaveras, attempting to kill her along with the other two sisters. However, the Senshi regain the advantage and knock the stick away, reducing her power once more. Rubeus then appears and reveals to Petz that he had actually expected her to fail; his goal was not her success, but to lure the Sailor Senshi out and sacrifice all four sisters to kill them. He then activates the stick's true power, creating a massive time-vacuum that threatens to pull in everyone nearby. No longer possessed and feeling remorseful, Petz decides she has enough power within her body to destroy the stick and jumps into the vortex to sacrifice herself to stop it. However, her other three sisters stop her. After the Sailor Senshi destroy the vortex, Petz is purified along with Calaveras.
Later, Petz and her sisters discover a wounded Saphir. Petz tends to him, even though she initially believes he has come to punish her sisters. It is then revealed that Petz and Saphir were romantically involved, making Saphir the person who caused Petz to become embittered about men. After Wiseman kills Saphir, Petz senses his death and is heartbroken, but she remembers how he smiled for her.