The Dark Kingdom
Queen Beryl serves Queen Metallia under the Dark Moon Kingdom. She has four servants, Jadeite, Nephrite, Zoicite and Kunzite who do her work for her. She has a temper, and ended up killing two of her attendants because she was angry with them at the time. Beryl has a secret "crush" on Prince Endymion, and brainwashes him to join their side. After Tuxedo Mask recovers his memories, he throws a rose at her and it pierces her in the chest. She would have died, but then Queen Metallia possessed her body to defeat Princess Serenity. When Metallia was killed by Sailor Moon, Beryl died as well.
Jadeite is the first of Queen Beryl's attendants. He was in charge of trying to defeat the Sailor senshi and search for the ginzuishou. He was mainly looking for energy, though, to give to Metallia so she could awaken with her true powers. Jadeite set up the senshi in an airport as a trap, using a special ability of telekinisis to move the airplanes around to attack the senshi. His plan failed when the planes turned on him. Even though he knew the identities of the first three senshi, Queen Beryl condemned him to eternal sleep in an ice crystal.
Nephrite took over after Jadeite. He was in charge of creating energy, but when plans changed he created the black crystal to locate the carriers of the seven ninjuishou crystals. He had the power of communicating with the stars, and based his energy attacks using the power. Eventually, he fell in love with Naru, Usagi's best friend. When Zoicite found out about this, he sent his youma to attack him. He was killed in Naru's arms.
Zoicite succeeded Nephrite after he killed him and stole the black crystal. He and Kunzite have a relationship, and whenever he is upset he usually asks for Kunzite's advice and or help. Zoicite succeeded in collecting five of the ninjuishou, and challenged Tuxedo Kamen for a "fair" fight for the others. During the battle, Kunzite appeared and stole the crystals from Tuxedo Kamen. Zoicite directly disobeyed Queen Beryl's orders by trying to kill Tuxedo Mask, and therefore earned his death sentance and died in Kunzite's arms.
Kunzite was the fourth general. He shared a relationship with Zoicite and taught him everything. Therefore, he is also the strongest. He was partners with evil Prince Endymion and hated him because he failed so many times. When Kunzite had his chance to once again impress Queen Beryl, he tried to defeat the sailor senshi with a boomerang attack. Unfortunately for him, Sailor Moon was able to reflect the attacks back upon him and he was killed.