Chibiusa is the first born child of Sailor Moon and Tuxedo Mask. When she first debuts in Sailor Moon R, she is on a mission to find the 20th Century's Silver Crystal, and to gather the Inner Sailor Senshi, to travel to her time (the 30th Century) and save her mother, Neo Queen Serenity. (Sailor Moon's future self.) Although she initially looks like a kindergartener, Chibiusa is really 900 years old at this point, as everyone who has had access to the Silver Crystal instantly gains a lifespan of around 1000 years. This is mentioned in the manga Pretty Guardian Sailor Moon #4. Wiseman temporarily turns her evil, aging her body to adulthood and granting her the title "Black Lady" but she is eventually cleansed of this evil, and becomes Sailor Chibi Moon. Over the course of the anime and manga series, Chibiusa makes frequent trips back in time for training, and unwittingly is responsible for branching out the team from six Guardians to an untold amount. One of these Guardians is Sailor Saturn, a troubled girl who becomes Chibiusa's best friend. Chibiusa also has a romantic dalliance with the Priest of Elysion, Helios, and in the SuperS movie, a sweet interlude with the dream fairy, Peruru. Chibiusa is killed more than once in the series, only to rise again as a stronger person, and through her experiences as Sailor Chibi Moon, she begins to have growth spurts, with the notion that she will eventually grow up. In the final Arc of Pretty Guardian Sailor Moon #12, Usagi discovers she is pregnant with Chibiusa on her wedding day. The final Short Story "Parallel Sailor Moon" shows this version of Chibiusa as a 15 year old, attending cram school with Hotaru, whose growth only occurs alongside Chibiusa. In this tale, Chibiusa is no longer stunted, and she has a younger sister, Kousagi, who is also a Sailor Guardian.