Black Moon Clan - Ayakashi Sisters

The four Ayakashi Sisters (あやかしの四姉妹, Ayakashi no Yon Shimai?) are subordinates of Rubeus. Their name is roughly translated in the subtitled DVDs as The Four Phantom Sisters; the exact meaning of ayakashi is "ghost that appears at sea during a shipwreck."

In the manga, the Ayakashi Sisters appear as the first line of offense in the Black Moon Clan's attack on Tokyo in the 20th century. They were sent back with the mission of attacking Sailor Moon's four guardian soldiers, to whom they appear to be more than a match for. The sisters are associated with things like UFOs, fortune telling, and communion with the dead. Each of the four sisters lures and attacks their counterpart Sailor Soldier in a very violent way before being killed by Sailor Moon. While each of the Sailor Soldiers are badly injured, Rubeus appears out of nowhere and captures them. The single exception to this is Calaveras, who is able to weaken Sailor Venus but as Rubeus had just been attacked, she is able to escape with Sailor Moon and Tuxedo Mask. The Black Moon Clan does not seem very concerned in the end about the loss of the sisters.

Although the Sisters are able to soundly defeat their Senshi opposite in direct combat in the manga, it is uncertain if they are more powerful than their Senshi counterparts. During Petz's confrontation with Sailor Jupiter, she alludes that their power is derived from the Black Crystal, as she tells Jupiter "Your hurricane is of that level? Watch - the earring of the Evil Black Crystal can call a tornado!". This suggests that their victory over each Senshi is due to the power of the Black Crystal, as opposed to their own power.

Like the rest of the clan, they all have the Black Moon insignia and wear earrings made of Black Crystal.

In the anime, the four sisters receive considerably more screen time, and thus their characters are expanded. Instead of taking up "weird" hobbies, they are portrayed as shallow superhuman girls, thus being equally as concerned over their beauty as their mission, splurging on cosmetics, clothes, jewelry, and perfume, much to Rubeus's chagrin. The standoffs in the anime between the sisters and their counterparts begin to take place, except at the end each of the sisters is healed by Sailor Moon's Silver Crystal. They also seem to be more evenly matched, power wise, in the anime compared to their Senshi counterparts. The four of them are healed by Sailor Moon, and they become powerless humans and mourn their traumatic past on the Planet Nemesis while running a makeup stand.

As in the manga, they all have the Black Moon insignia, though they do not wear earrings made of Black Crystal.