Kousagi is a Sailor Senshi, though no name is given to her. She hangs out with the daughters of the other Senshi: Mina Aino, Mako Kino, Rei Jr, and Ami Jr.. Unfortunately for her, they only hang out with her because their mothers are friends. She is largely disliked by her friends as she eats a lot and puts out everyone's enthusiasm. Mina, Mako, Rei and Ami often run away from her and make her do things for them. After sensing the planet is in danger, Kousagi's friends realise they need to save her.
They attend a cooking class taught by Michiru, Haruka, and Setsuna. Kousagi is nicknamed Chibi by her older sister, Chibiusa. Kousagi has the same hair style as her sister, but instead of two odango, she has four. Her Senshi outfit is adorned with bunny heads. She does not really have any attacks, but to transform, she yells out "Parallel Moon Power, Make Up" using an unnamed compact.
Kousagi has bright pink hair styled into four cone-shaped odangos with pigtails that curl at the ends and blue eyes. Her civilian outfit consists of a short summer dress with ball shaped patterns on it and dark coloured sandals.
Her Sailor fuku consists of a white leotard with a chest bow and a white bunny head brooch affixed to it. Her sailor collar had three stripes, her tiara had a white bunny head, her earrings were bunny head studs, and she wore a choker with a bunny head motif. There were bunny head clips in her hair and bunny head coverings that cover all four of her cone-shaped odangos. She wore elbow-length gloves with padding, her skirt was featured two belts with a bow at the back. Her footwear consisted of knee-high heeled boots with circular padding at the borders.
Kousagi appears in the side story Parallel Sailor Moon where she is seen chasing Ami Jr, Rei Jr, Mako, and Mina. They complain about having to let her stay with them, but promptly leave her behind. Before deciding who would look after Kousagi with a game of rock, paper, scissors, they hear Kousagi scream that there's a pink cat on her.
They force her to bring the cat despite it being one of her biggest fears and make her carry their bags. After running off again, Kousagi is left trying to catch up then the four girls see a bright light that they believe is a UFO or meteorite. They then suddenly feel that the earth is in danger in their own ways and also realise they have to protect Kousagi. Kousagi is then hit by something and finds herself with the pink cat as a human. The cat tells her that she must transform and save the planet, and that she can call the other girls her underlings. Kousagi agrees and meets up with Ami Jr, Rei Jr, Mina, and Mako who are now also Sailor Senshi.
The bright light is revealed to be a herd of rabbits and Kousagi summons a horde of cats to become a giant lynx and eat the rabbits. The five girls then wake up to an annoyed Setsuna, Haruka and Michiru who chide them for falling asleep after arriving late to their cooking class. Afterwards, Kousagi questions whether it was all a dream or not.
Powers and abilities
- While Kousagi didn't have a formal attack, she shouts, "Kitty-cats, Kitty-cats, become one humongo Lynx!!" to turn the cats she and the Parallel Inners gathered into a giant lynx to devour the giant rabbit.
- Brooch: Kousagi received an unnamed brooch from the pink cat that allowed her to transform into her Senshi form.
- Unnamed Weapon: While instructing the cats to become a giant lynx, she is seen holding what resembles the Moon Stick, though it is not shown in much detail.
- Kousagi's name means "Child Rabbit of the Moon."
- Because her Senshi form is unnamed, fans often refer to her as Parallel Sailor Moon or Sailor Rabbit.
- Her character seems to be sort of a "what if" situation, as the Sailor Quartet assume in the Stars arc that the Queen of the Moon can only have one child, which in this case, is Chibiusa, but that was only a rumor they had heard and is not confirmed in canon.
- As the second daughter of Mamoru and Usagi, she looks almost the same as Chibiusa.
- Her blood type is O.