Selling fattening candy that made whoever ate it fat and unhealthy and opening up a spa that would drain the energy out of the clients who went there.
DeVleene has short curly hair and is somewhat curvy. She wears a white/light-colored blouse with a bow and a heart, black/dark skirt with a heart stitched in the middle of it, and high heels. Her accessories include earrings and a hairband.
She executed a plan similar to Jadeite's plan in episode 4 of the Sailor Moon anime, when she introduced fattening candy called Rainbow Chocolates around Valentine's Day. She managed to fatten up a majority of the female population, and opened a spa which promised a result in weight loss, but it was only used to suck out the energy of the clients. She was later defeated by Sailor V's Sailor V Chop and Crescent Slender Beam.