Hime-chan no Ribbon

is a Japanese magical girl manga series created by Megumi Mizusawa that was serialized in Ribon Magazine from August 1990 to January 1994. It was later developed into a 61 episode anime series, produced by Studio Gallop, that aired from October 2, 1992 to December 3, 1993.

Plot
Himeko Nonohara, also known as Hime-chan (姫ちゃん), is an aloof, childlike, yet boasty thirteen-year-old girl who frets over the fact that she is the biggest tomboy in the school. Himeko would like nothing more than to be a proper, feminine young lady, like her older sister Aiko, so that she could approach her secret crush, Kouichi Hasekura.

One night, Himeko is unexpectedly approached by a girl, who is a near-mirror image of herself, floating outside of her bedroom window. The girl is Princess Erika of the Magical Kingdom, where she and the kingdom's citizens have their own exact counterparts in the Human World. Erika gives Himeko a magical red hair ribbon as part of her succession test to the throne, which allows Himeko to transform into anyone in the Human World for one hour. But she must recite the magic incantation in reverse before the time limit or otherwise be trapped in that person’s form forever.

Also given to Himeko is Erika's stuffed lion, Pokota, whom the ribbon brought to life. Throughout one year, Erika monitors Himeko through her crystal ball as Himeko wears the magic ribbon without revealing the ribbon's secret and the existence of the Magical Kingdom to anyone. Otherwise, Himeko's memory will be erased as punishment.