Dumbull

Passing as a human, Dumbull had fair skin, orange hair tied in a bun, and a purple wrestling leotard set off by red arm-warmers. Her true self kept much of that shape but darkened, the outfit deepening toward purple, the hair growing longer and taller, and the skin shading to a sickly pale green. The design drew openly on wrestler Bull Nakano, whose towering upright hairstyle and face paint were famous when the episode aired.

Dumbull fights like the grappler she resembles, stomping and overpowering opponents up close, and she can also loose a wave of energy strong enough to blast a target clear across a ring.

Koan had already seeded the fighting arena at Rei's temple, secretly a Crystal Point, with negative energy before Grandpa's first martial arts lesson. Posing as students, Koan and Dumbull talked Grandpa into steering the class toward combat, and the tainted air soon turned the pupils savage until they rounded on the old man. He bested them, but Koan then loosed Dumbull, who shifted to her true form and set upon him; Rei threw herself over her grandfather and took the stomping meant for him. After Dumbull's energy wave hurled Grandpa into a corner, Usagi transformed to fight back. Tuxedo Mask blocked the Droid's next blast and met her mid-air with a drop kick that knocked her flat, and though she landed on her feet, Sailor Moon finished her with Moon Princess Halation. She remains the only Droid Koan ever sent.