Shock! Senpai's Confession
Since she arrives at the school gate late, Hime-chan spots Gori-sensei on guard. She uses a car mirror to turn herself into the principal. After that she stands in front of a mirror to turn back to her own self, but it doesn't work at all. She later turns herself into her sister Aiko. Hasekura confesses to her thinking it's real Aiko.
Aired 09/10/1992EP 2 - Shock! Senpai's Confession

Hime-chan no Ribbon
Erika, the princess of the Magic Kingdom has come to Earth in order to find a human girl who looks just like her. That girl turns out to be Himeko Nonohara, a tomboy's tomboy. Erika must give Himeko a magical item she has created in order to prove her worth as a successor to the crown. Himeko must test this item, a hair ribbon that allows her to transform into any other person she sees, to see if it is worthy. The series follows Himeko's adventures and her budding romance with Daichi, the boy who discovers her secret.
(Source: Anime News Network)