I think this is less a seiyuu joke and more a reference to the fact that both are witches that move through dimensions, torment a human man, and are represented by butterflies.
oyashenron said: I think this is less a seiyuu joke and more a reference to the fact that both are witches that move through dimensions, torment a human man, and are represented by butterflies.
Giant+Robot is right, both are voiced by Ohara Sayaka