Queen Serenity

クイーン・セレニティ

Serenity is an incarnation of the Moon Goddess Serene and the Queen of the Silver Millennium.
Her primary responsibilities were to safeguard the Silver Crystal and to raise her daughter, Princess Serenity, to become a fitting heir. During that era, a war raged between Earth and the Moon, as the people of Earth grew envious of the long, prosperous lives enjoyed by the inhabitants of the Moon Kingdom. Despite this conflict, Earth's Prince Endymion chose to fight for the Moon (partly because he was in love with Princess Serenity, and partly because he disapproved of his people's actions).
Unfortunately, Queen Metallia, the ruler of the Dark Kingdom, attacked the Moon, destroying everything. Everyone was killed except for Queen Serenity and her advisors, Luna and Artemis. Mourning the loss of her daughter and all her subjects, Serenity used the Silver Crystal to seal away Queen Metallia and to send the souls of everyone who had died that day to be reborn in the future. Sadly, Queen Serenity had expended the full power of the Silver Crystal, meaning she died immediately after using it. Her spirit then remained on the Moon, watching over the Earth until Princess Serenity was born again.
Queen Serenity plays a very minor role in the anime. Towards the end of the first series, she appears as a sprite to the Sailor Senshi, revealing the history of the Moon Kingdom to them. This sprite appears again to Usagi at the beginning of the R series, returning the Silver Crystal to her along with a new transformation brooch. After this, she is never seen again.
In the manga, Queen Serenity's role is slightly larger: instead of appearing as a sprite to the Senshi, she appears as a holographic image (though she looks exactly the same). She also appears after Usagi defeats Queen Metallia and asks her to take her place as Queen of the Moon (but Usagi refuses). The story becomes more interesting in the Super S manga, where Usagi experiences a series of flashbacks to her childhood in the Moon Kingdom. It is revealed that the evil Queen Neherenia was Queen Serenity's sister, and that both originally came from somewhere else in the galaxy before arriving at the Moon. When Princess Serenity was born, Neherenia tried to convince Queen Serenity to join her in her evil plans. When Serenity refused, Neherenia placed a curse on the baby Princess and tried to claim her victory, but was soon defeated when Queen Serenity sealed her in a mirror.
When the princess reached four or five years old, she began having nightmares that predicted the outcome of her curse. It is here that Queen Serenity gives Usagi the most important piece of advice she ever receives in the entire series: "We all have a star in our heart. Darkness and light are always right next to each other. Show a little fear or a drop of tear and the darkness will grow and start to attack, consuming the light. Serenity, you must always keep the star in your heart shining strong to defeat the dark and evil souls. That is your most important mission, Serenity..."