Also known as: 鳥かごの魔女
Mahou Shoujo Madoka Magica character.
One of the Witch (Madoka Magica)es seen in episode 10. She appears as a pair of legs trapped inside a birdcage. Her familiars are Gotz (Madoka Magica).
Note: Major spoiler warning!
Roberta was speculated to be Tomoe Mami's witch form; this has been proven false when Candeloro was confirmed to be Mami's witch form. Roberta's original identity remains unknown.