Queen Beryl

Queen Beryl is the main antagonist in the first arc of the Sailor Moon manga, and its adaptation in the first season of Sailor Moon Crystal. She is the Queen of the Dark Kingdom and a servant to the entity known as Queen Metalia. She is also one of Sailor Moon's two arch-nemesis (alongside Queen Nehelenia). Queen Beryl is a tall, beautiful fair-skinned woman with thick, fiery long curly red hair, glowing orange eyes and sharp red fingernails. She wore a low-cut indigo dress with spiked shoulders, a purple tiara with matching bracelets and a matching set of silver earrings, necklace and belt. Once a member of the Earth Kingdom, she fell in love with Prince Endymion, but was heartbroken to find that he loved Princess Serenity of the Moon Kingdom. This led to Beryl crossing paths with Queen Metalia, who offered to give her the means to exact revenge by declaring open war on Silver Millennium itself. Ultimately, having gathered a large majority of Earth Kingdom residents to join her campaign, Beryl ended up killing Endymion in a fit of rage, leading to Princess Serenity's tragic suicide before Queen Serenity put a stop to Metalia's evil.

However, Beryl reincarnated in present day and was subconsciously guided to the ruins of the Earth Kingdom at D-Point in the Arctic. There, Beryl undid Serenity's seal on Metalia and regained her memories as she established the Dark Kingdom with Endymion's four knights Jadiete, Nephrite, Zoicite, and Kunzite as her Four Kings of Heaven. While claiming to seek the Legendary Silver Crystal for Metalia, using the being's power to revive Endymion as her thrall, Beryl actually intended to betray her benefactor and use the crystal's power for her own agenda. But Beryl was killed when Sailor Moon used the Moon Kingdom's sacred blade to destroy the necklace that bound Beryl to the mortal coil.