Protect Esthe (プロテクト・エステ) was an aerobics class taught by Rei's grandfather and Yuuichirou Kumada in episode 63 of the Sailor Moon anime. Realizing that the Hikawa Shrine was a Crystal Point, Koan and her Droid Dumble disguised themselves as participants and joined the class in order to flood the shrine with Dark Power.
After Koan and Dumble's actions disrupted the classes, Rei's grandfather shut down Protect Esthe and instead started a new class, Project Jazz Dance.
- "Esthe" (エステ) is an abbreviation of esthetic.
- In the English dub Protect Esthe was a martial arts class.