In the first Picture Diary, Chibiusa is rescued by Sailor Moon and Venus and dreams that night about becoming a "soldier of love and justice" herself.

She calls herself "Sailor Chibiusa Moon" and appears in a uniform slightly different from the one she wears later, most notably including a cape.

Chibiusa is five years old approximate in both civil registration and physical appearance; however, she possesses a degree of intellectual maturity that is normally non-existent in a five-year-old girl.

In act 20 of the manga, it is stated that she is chronologically 900 years old, which lends credibility to her apparent wisdom, maturity, and rather serious personality over her teenage biological mother Usagi (in the 20th century).

Despite being self-aware of the fact that Usagi Tsukino and Mamoru Chiba are her biological parents, she does not immediately identify them as such, instead suspiciously viewing them as strangers who look like them.

[13] There is evidence that Chibiusa has a hard time identifying Usagi and Mamoru as being her parents due to observing a sharp contrast in personality between their "immature" present selves and their "wise" future selves.

However, it is worth mentioning their forms Neo Queen Serenity and King Endymion are centuries into the future, leaving enough time for the couples' personalities to mature.

She also reacts differently toward Usagi and Mamoru than she does towards King Endymion and Neo Queen Serenity, being more respectful to the latter but more spontaneous to the former;[13] it is not clear if she prefers one set over the other.

Chibiusa develops an electra complex towards her teenage father Mamoru (in the 20th century) and always refers to him as Mamo-chan—an affectionate nickname by Usagi—much to Usagi's fury and expense.

At times, a mother and daughter relationship is established between the two, shown in various everyday actions such as Usagi holding Chibiusa's hand to cross the street, etc.

In Sailor Moon Crystal, Usagi talks to Chibiusa as in a mix of motherly and sister fashion; the two eventually regards each other as best friends.

[22] Chibiusa hates homemaking and "taking care of the house"[23] and is afraid of such things as thunder and lightning,[24][25] ghosts, vampires,[26] dentists,[27] and needles.

As a character with different incarnations, special powers, transformations and a long lifetime virtually spanned between the 20th and the 30th centuries, Chibiusa gains multiple aspects and aliases as the series progresses.

As she grows stronger, Sailor Chibi Moon gains additional power, and at key points her uniform changes to reflect this.

[31] Princess Usagi Small Lady Serenity (プリンセス・うさぎSLセレニティ, Purinsesu Usagi Sumōru Redi Sereniti),[1] is the official name and title that is often shortened by her parents and family friends to Small Lady (スモール・レディ, Sumōru Redi) to better differentiate her from her mother; this is the name that Chibiusa is known by in her 30th century timeline.

The only other character to use it, besides the royal family and its friends and allies, is Diana, who periodically calls her by Small Lady and uses honorific endings "-denka" to indicate that Chibiusa is a non-sovereign crown princess.

Her princess form also appears in Artbooks IV and the Materials Collection, in which she is drawn among the other Sailor Soldiers in their specific gowns.

[34][35] In the end, when the enemy is defeated and Helios has departed on the back of the "real" Pegasus, Chibiusa thinks to herself that when she has grown up, he will become her "prince.

[6] Obsessively in love with Mamoru, Black Lady abducted Tuxedo Mask when he entered the space-time storm after Wiseman turned her into his servant.

In the anime reboot Sailor Moon Crystal, Black Lady was also present as a shadowy silhouette to insult Rubeus as Wiseman kills him.

Black Lady's anguished crying awakened the future Silver Crystal's power, shattering Wiseman's spell over her as she reverts to her original form and reawakens as Sailor Chibi Moon.

Chibiusa travels through time at various points in the series[38] using the Key of Space-Time given to her by Sailor Pluto (in the manga and Crystal, she stole it).

Chibiusa is not shown using unassisted powers until she transforms into a Sailor Guardian by activating a special device and shouting a certain phrase.

"[44] In the anime, this is the first time Chibiusa takes on her Super form, and throughout the fourth series she and Sailor Moon share a single transformation sequence.

[45] Sailor Chibi Moon is strengthened significantly in the fourth story arc by Pegasus, who takes refuge in the Golden Mirror of her dreams.

He grants her a new transformation (shared with Usagi, in the anime), and gives her two special items with which to contact him: the Stallion Reve, for simple communication, and the Crystal Carillon to summon him in battle.

[51] She also uses several comedic one-offs, including fending off a vampire with "Garlic Attack"[7][26] jump-kicking with Sailor Moon,[52] and amplifying the sound of her crying to a deafening level with her hair-pieces.

[55] When she returns from the future in the final story arc with her guardians, the Sailor Quartet, they perform "Pink Ladies Freezing Kiss" together.

In Viz Media's English re-dub by Studiopolis, Chibiusa's voice is provided by Sandy Fox in both her normal and "Black Lady" forms.

[59] Ayano Gunji, the longest running Chibiusa actress, stated that the manga and anime of Sailor Moon was #1, and she was happy to watch the show.