|プリンセス・セレニティ (Purinsesu Sereniti)|
Moon Humanoid (before reincaranation)
Queen Serenity (mother)
In the manga, Serenity was fascinated by the Earth. Even though she was given orders not to go to the planet, she secretly visited there and met Prince Endymion. The two then fell in love. During the Dark Kingdom's attack which caused the Moon Kingdom's downfall, Prince Endymion died protecting Serenity. She committed suicide due to Endymion's death. Serenity's mother, the Queen, sealed away the evil and the moon (as seen in Volume 3), but everyone involved was killed. Before her own death, the Queen used the Silver Crystal to give her daughter and others another chance at life, hoping in particular that, this time, Serenity and Endymion could find happiness together.
Queen Metalia killed both Serenity and Endymion, unlike the manga. Serenity's mother, the Queen, was able to seal away the evil which had inspired the attack, but everyone involved was killed. The Queen then used the Silver Crystal to give her daughter, her love, and the Sailor Senshi another life, hoping in particular that, this time, her daughter and the prince would finally find happiness.
Pretty Guardian Sailor MoonEdit
In the live-action series, it was Princess Serenity herself who destroyed the Moon Kingdom, after Endymion was killed during the war to keep the two apart. She had full control of Sailor Moon's upgraded form Princess Sailor Moon, which caused Usagi to get into an internal conflict with her doing the last parts of PGSM. As Serenity selfishly refused to see the consequences of her actions that it would have on Earth, claiming that she has no qualms in destroying the Earth if Endymion was ever taken away from her. Usagi underwent endurance training to keep both her and the Silver Crystal in line. For a while, she was successful in keeping both the crystal and Serenity at bay. However when Usagi was forced to kill off a possessed Mamoru, Princess Serenity overcame her resistance, transformed into Princess Sailor Moon and successfully destroyed the planet. Eventually, she realized the full extent of the consequences it brought her when she ignored Usagi's warning by destroying the planet and grieved the loss of life on Earth. Upon seeing Endymion who encouraged her to use the Silver Crystal again to reverse the destruction, Serenity did out of love and finally made peace with Usagi. The Senshi lost their power to transfrom as the Silver Crystal was destroyed, but in the Special Act Queen Serenity sent a sword to earth that would give the Senshi their power back for one day.
Eventually, Serenity reincarnates as Usagi Tsukino in the 21th century. Usagi occasionally takes the form of Princess Serenity during the meta-series, often at climactic moments when more strength is needed than Sailor Moon can access.
In the manga, Serenity almost always has silver hair. In the anime, she is always blonde. In the live-action series, she has black hair, just like Usagi, and it is worn straight rather than in pigtails. This emphasizes the ambiguity of her identity before it is revealed that she is Usagi.
At climactic moments, Usagi as Serenity sometimes gains a pair of functioning angelic wings. She does this during the final battles of SuperS, to save Chibiusa Tsukino when the two of them encounter Pegasus and Sailor Stars, during the fight with the fully-possessed Galaxia when she grabs the Sword of Sealing. It is unclear if this power comes from her past life, is Usagi's own power, or came from Pegasus and the Sword of Sealing.
- A character from the cartoon Adventure Time named Fionna once wore a dress similar to hers.
- Coincidentally, Fionna wore a hat with rabbit-like ears, and Princess Serenity's Earth incarnation is named Usagi, the Japanese word for rabbit.
- Rebecca Sugar actually admitted that the dress was inspired by Sailor Moon.
- In Act 41 (Yume/Dream 8), the Sailor Senshi suddenly recall a flashback of the celebration of the birth of Princess Serenity, and it shows Serenity as a baby and the Inner Senshi as children around the age of 6-9, implying that in the past, the Inner Senshi were older than Princess Serenity.
- During some of the climatic battles of the anime, Sailor Moon becomes Princess Serenity, implying she is at her strongest in that form. In the manga, Sailor Moon defeats the main antagonists without becoming Princess Serenity.