Usagi Tsukino (月野 うさぎ, Tsukino Usagi; renamed Serena in the DiC and Cloverway English adaptations and Bunny in the Mixx/Tokyopop adaptation), better known as Sailor Moon (セーラームーン, Sērā Mūn), is a fictional character and the main protagonist of the Sailor Moon franchise created by Naoko Takeuchi. She is introduced in chapter No. 1 of the manga, "Usagi – Sailor Moon" (originally published in Japan's Nakayoshi magazine on December 28, 1991), as a carefree Japanese schoolgirl who can transform into the magical "Guardian of Love and Justice", Sailor Moon.