After Alan and Anne were defeated by the Sailor Scouts and Serena and Darien were really starting to realize their love for each other, new enemies arrived from the Dark Negamoon. Led by Rubeus, these four sisters were given the task of turning Crystal Points of future Tokyo into Dark Energy Strongholds in the past.

Each of the four sisters possessed different powers. Interestingly enough, some of them even resemble those of the Sailor Scouts. Eventually, however, Sailor Moon and the other Scouts made them realize that leading a life of good is far better then leading a life of evil and hatred.

In order from left to right: Catsy, Birdie, Avery and Prisma.

Catsy is the most vain of the Four Negamoon Sisters and rarely even physically fights with the Scouts. Normally, she'll use a whole barrage of energy attacks and will stay at a distance. She had a crush on Rubeus and he took advantage of this by using this puppy love to manipulate her. She was turned good when Rubeus had finally gotten angry at her for screwing up again and gave her a powerful energy bomb, big enough to kill everyone nearby, including herself. Sailor Mars, Rey, saw the good in her and Sailor Moon transformed her into a normal human being and they became good friends.

Birdie's the youngest of the Four Dark Negamoon Sisters. Her powers are those of ice and cold. (Kind of like Sailor Mercury.) She was nearly successful on several occasions, if Avery and Prisma had not interfered. Birdie was the only sister to feel bad when Catsy was lost to the good side. She joined Catsy when she failed a Chess Tournament scheme and threatened to turn herself to a block of ice. Catsy showed her that she cared for her and Sailor Moon turned her to good.

I think that she's the coolest... (Heh heh heh, get it? Coolest?) Anywayze, I like her choice of costume.

Her outfit is also one of my favorites. I mean, well, where else can you find a bad guy with a kick ass outfit like that one. Hmm... I think if I was Tuxedo Mask, I would have a serious change of sides.

Prisma is the eldest of the Four Negamoon Sisters and was usually taking up schemes in a partnership with Avery. Normally, she'll succeed in a mission, but the energy was very little. She was turned good when she was given a powerful Dark Crystal Scepter by Rubeus and her and Avery fought over it. Prisma won. Prisma went on a rampage and nearly killed all of the Scouts with a time warp that she had created with the scepter. Birdie and Catsy, who were already turned good, tried to convince her that being good was better. Avery began to believe them and Prisma called her a traitor. The Scouts saved Avery before Prisma blew her to bits with the energy blasts and eventually Prisma realized what she was doing and allowed Sailor Moon to heal her. Finally, the Four Dark Negamoon Sisters were all on the same side again.

She had a secret love for Prince Diamond's brother Saffire. She was trying to help him recover and turn good, if Wiseman had not killed him first. After he was killed, she just stood on her balcony and wept.