Chibiusa Tsukino is the civilian identity of Sailor Chibi Moon.
Chibiusa Tsukino is the Crown Princess of the 30th century kingdom of the Moon, Crystal Tokyo.
She is the first princess of the Silver Millennium known as Small Lady by the Sailor Senshi of the future. The Black Moon Clan call her Rabbit. She travelled through time so she could save her mother. She is really good at the Sailor V game. Her best friend is Momoko Momohara.
Act 14 - Chibiusa falls from the sky through a time portal and lands on the back of Usagi's neck and kisses Mamoru Chiba on the mouth in the process. She introduces herself as "Usagi Tsukino" and asks Usagi why she has the same hairstyle and the same name as her. Realising that she's found the person she's looking for, Chibiusa pulls out a gun and threatens Usagi to give her the Silver Crystal or she'll shoot.
Act 15 - Mamoru grabs Chibiusa just as the toy gun goes off and Usagi falls to the ground, Chibiusa runs off. Usagi and Mamoru find Chibiusa in a park sitting on a swing. When he takes Chibiusa's hand, Mamoru receives a vision of Crystal Palace. Usagi and Mamoru take Chibiusa to Usagi's home. Chibiusa decides to stay at Usagi's place to keep an eye on her. When Chibiusa uses Luna-P to hypnotise Ikuko Tsukino, Kenji Tsukino, Shingo Tsukino, Usagi and Mamoru into believing she is part of the family, Luna knocks Usagi and Mamoru out of the way. Chibiusa follows Usagi everywhere.
The next day at breakfast before she goes to Rei's School fair, Usagi yells at Chibiusa not to follow her and informs Luna to keep an eye on her. While Ikuko gives Luna a saucer of milk, Chibiusa runs off to Rei's School. When she is knocked down by a sister, Rei attends to her but she gets up and runs away while watching everything that happens.
Act 16 - After Rubeus abducts Sailor Mars, Sailor Moon spots Chibiusa spying on them. Sailor Moon suspects Chibiusa is a friend of their new enemy, the Black Moon Clan. When Luna gets in the middle of Sailor Moon yelling at her, Chibiusa runs away. After Luna turns up at Mamoru's door, he follows her to a park where they find Chibiusa and bring her back to his apartment. Chibiusa sleeps in Mamoru's bed and dreams of her parents. When she wakes up crying, Mamoru cheers her up with a Tuxedo Mask puppet and a rose. Chibiusa shows her Luna-P ball to Mamoru and Luna after Luna introduces herself. Chibiusa wants to know if Sailor Moon is a good person because she believes she is the only one who can save her mother.
The next day Mamoru brings Chibiusa back to Usagi's home where Ikuko takes her inside and makes her pancakes.
Act 17 - Chibiusa gives her Tuxedo Mask puppet to Usagi to borrow in hopes of cheering her up. Chibiusa follows Usagi to the arcade where she has gone to meet Mamoru. Chibiusa plays the Sailor V video game which alerts Minako via her Star Power Stick. Usagi, Mamoru, Makoto Kino, Minako Aino and Motoki Furuhata who are watching Chibiusa are surprised at how good she is, achieving the highest score of all time. Usagi is jealous at how good Chibiusa is at playing all the games in the arcade. Motoki gives a limited edition Sailor V doll to each Usagi and Chibiusa for being such good customers. Mamoru takes Chibiusa home while Usagi, Makoto and Minako meet Luna and Artemis at Headquarters.
While watching Ikuko and Kenji in the kitchen, Chibiusa begins to miss her parents and leaves the house. She casts a spell with the help of Luna-P to make things fun. Luna-P transforms into an umbrella which when Chibiusa open's it, birds fly out. Mamoru seeing Chibiusa on the street at night puts his hand on her shoulder and receives a vision of an entire city exploding.
Act 18 - Chibiusa brings home her new friend, Momoko after school for a play date. When Usagi, Minako, Mamoru and Luna arrive with the intention of confronting Chibiusa about her knowledge of the Black Moon, Chibiusa spots Mamoru holding the Black Crystal Earring inside a Petri dish and becomes very frightened by its presence.
Chibiusa cries in Mamoru's arms, while Minako inquires as to why she is scared of the earring. Minako gets frustrated over how uncooperative Chibiusa is being.
As Usagi sleeps Chibiusa sneaks into her room and steals the Crystal Star right off of Usagi's school uniform. When she finds Chibiusa in the park next to the fountain with her brooch, Usagi demands it back. Rubeus arrives with the intention of killing Usagi and Chibiusa when Tuxedo Mask appears and knocks down Rubeus. Usagi and Tuxedo Mask politely requests the brooch back because Usagi doesn't want to lose Sailor Venus too, she hands it over.
Chibiusa explains why she stole the Silver Crystal to Sailor Moon, Sailor Venus, Luna, Artemis and Tuxedo Mask after the battle with Calaveras. Even though she knew no matter how many Silver Crystal's she had she still wouldn't be able to use them. The past Silver Crystal only has power in the past and the future Silver Crystal only works in the future. She was taught that if the two Silver Crystal's together would be dangerous in the same time zone. But still had to try it anyway then maybe with that power she might be able to help. That's why she came to the 21st century from the 30th century. Chibiusa asks for help to save the future.
Act 19 - Chibiusa explains that she travelled through time from Crystal Tokyo in the 30th century. There was a sudden explosion then her mother wouldn't wake up. Usagi and Chibiusa stay at Mamoru's apartment overnight.
The next morning Chibiusa makes up her mind to face her fears and return to the future. At the park near the fountain, Chibiusa uses her space-time Silver Key to open a time-warp that will take Sailor Moon, Sailor Venus, Tuxedo Mask, Luna, Artemis and herself to the future. Chibiusa remembers the advise Sailor Pluto gave to her about time travel being strictly forbidden. They all hold hands as Chibiusa calls out the incantation to activate the wormhole to the future. As they begin to travel through time they let go of Chibiusa's hand.
Just as Sailor Pluto is about to destroy Sailor Moon, Sailor Venus, Tuxedo Mask, Luna and Artemis, Chibiusa intervenes, telling Sailor Pluto she is the one who brought them to the future to save her mother. When she properly introduces herself as Princess Small Lady Serenity, the team is shocked to find out that Chibiusa is a princess. Sailor Moon, Sailor Venus, Tuxedo Mask, Luna, Artemis and Chibiusa leave behind Sailor Pluto as they enter the 30th century.
Chibiusa recalls, one day there was an unbelievably big explosion that rocked the city. When the dust settled the monolith appeared and everyone except Chibiusa had collapsed. On the way to the Crystal Palace, they are stopped by Esmeraude's underlings the Boule Brothers. The Boule Brothers immobilise the team at an atomic level with their Electrochemical Side Chain. Tuxedo Mask frees them and he and Sailor Venus destroy Chiral and Achiral. Chibiusa leads the others inside the Crystal Palace to where her Mother, Neo-Queen Serenity sleeps encased within the Silver Crystal. Chibiusa is happy to see Diana alive. She sees her father.
Act 20 - When Chibiusa goes to hug her father, she passes right through him. Diana informs Chibiusa that King Endymion has been watching over her from the shadows the whole time she was in the past. Because the King is unable to protect his daughter in his current form, Chibiusa must return with the others to the future.
Sailor Moon, Sailor Venus, Tuxedo Mask, Chibiusa, Luna and Artemis travel right back to where they started in the past. Tuxedo Mask takes Chibiusa home with him because he is responsible for her and so Sailor Moon will be able to get some rest.
Luna-P alerts Chibiusa to the presence of Esmeraude, who grabs her by the throat with her Beast Hand then Sailor Moon, Sailor Venus, Tuxedo Mask, Luna and Artemis arrive. Sailor Venus uses her Venus Love-Me Chain against Esmeraude and she drops Chibiusa who Tuxedo Mask manages to catch.
Act 21 - Chibiusa recalls when she was in the past wondering if Usagi was really her mother, Neo-Queen Serenity. Chibiusa watched Usagi with Ikuko getting a lecture on another low test score. She wants so much to be like her mother but she believes she'll never grow up to be a lady. Chibiusa lost self confidence when she was bullied by boys.
Chibiusa blames herself for everything that has happened, she used Luna-P to break the Silver Crystal out of its casing. Neo-Queen Serenity seen it was missing and went look for her daughter, when she was attacked by Prince Demande.
Once went she ran away from a group of bullies, Chibiusa went down a forbidden corridor in the very back of the Palace that's when Chibiusa found the Space-Time Door. When she went through the door she met Sailor Pluto, who taught her to cast a spell using Luna-P that will make her better whenever she is feeling down.
When Chibiusa visits Sailor Pluto who she finds her with her father. Chibiusa walks off into the space-time void alone. Luna-P alerts her to danger, Chibiusa searches for her Silver Key but is lost. Wiseman appears and temps Chibiusa with his words, until Chibiusa takes his hand.
Act 25 - Black Lady memories come flooding back to her, she remembers throwing Luna-P at Sailor Pluto to distract her while Chibiusa stole a Silver Key from her chain.
When Black Lady's crystal earrings shatter and she is transformed back into Chibiusa, time resumes and she transforms for the first time into Sailor Chibi Moon.
Act 26 - Usagi awakens wondering if it was all a dream until Chibiusa pokes her head around Usagi's bedroom door and greats her good morning. On their way to where Usagi thinks is school, Chibiusa informs Usagi that she is returning to the 30th century. Usagi runs back home, Chibiusa follows and they cry. Usagi and Chibiusa return to where Chibiusa first fell from the sky near the fountain in the park. When Mamoru arrives, he gives Chibiusa his Tuxedo Mask puppet as a farewell gift. Chibiusa gives Usagi her mothers Spiral Heart Moon Rod that Neo-Queen Serenity sent to go with Usagi's new Cosmic Powers. As Chibiusa leaves she lets Usagi know that she will miss her the most.
When Usagi and Mamoru kiss, Luna-P drops from the sky and bounces onto Mamoru's head followed by Chibiusa who lands onto the back of Usagi's neck again. Chibiusa hands a letter from Neo-Queen Serenity to Usagi stating Chibiusa is back for Sailor Guardian training.
Act 27 Part 1 - While eating breakfast with Diana, Chibiusa hears a news-report that Luna and Kenji are watching about an unidentified monster that could be a result of atavism. Chibiusa inquires to the meaning of atavism, Kenji tells her it is an evolutionary throwback. When Usagi runs off to meet Mamoru in the park, Chibiusa follows her. After giving Usagi her lunch she left at home, Chibiusa walks to school with Momoko and another friend.
Act 27 Part 2 - Chibiusa and her friends go to the new amusement park in Sankakusu with Mamoru as their chaperone. While riding the rollercoaster with Momoko, Chibiusa's hat blows off. When she chases after it, Chibiusa tells Momoko to stay behind, but she finds Mamoru that Chibiusa has left the park alone and he goes after her.
When Chibiusa finds her hat on the steps of Mugen Academy outside in the restricted area she sees Hotaru Tomoe crying. When Chibiusa asks if Hotaru is alright, she slaps her hand away and explains she gets these attacks often but it will soon pass on its own. Usagi comes across Chibiusa. Both Chibiusa's Prism Heart Compact and Usagi's Cosmic Heart Compact glow. When a Daimon attacks Usagi and Chibiusa, they scream and Ami, Rei, Makoto and Minako come running. Unbeknown to them, as all 6 transform they are watched by Sailor Neptune, Sailor Uranus and Hotaru Tomoe. For the first time Chibiusa calls out Moon Prism Power, Make Up to transform into Sailor Chibi Moon.
Act 28 - Usagi, Ami, Rei, Makoto, Minako, Mamoru and Chibiusa meet at HQ where Luna and Artemis have been analysis the two unknown Sailor Guardians. Chibiusa is wonders about Hotaru.
While at the Fruits Parlor Crown Cafe, Chibiusa tells Usagi, Ami, Makoto and Minako how she was selected to be class President of her second grade class home room and she even got to attend the entrance ceremony to welcome the new first grade students.