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Bernkastel (ベルンカステル ,Berunkasuteru?)
She is also known as the Witch of Miracles, and greatly resembles Rika Furude from Higurashi no Naku Koro ni. Her name also suggest some connection to Rika's "alter-ego", Frederica Bernkastel. It is said she resides in a world where concepts such as fate and probability can be visualized. She appears to see Beatrice's game to ease her boredom. She assists the player by giving some hints around the workings of the game. Her "Magic of Miracles" allows her to reset a desperate situation as long as the probability of a favorable situation isn't equal to zero.

Lambdadelta (ラムダデルタ ,Ramudaderuta?)
Another witch who fought Bernkastel in a "game" in the past. Her name and appearance hint at her being connected to Miyo Takano from Higurashi. "Lambdadelta" (λδ) represents thirty-four when using Greek numerals and "Miyo" (三四 ?) can translated as "three, four" in Japanese. Despite that she is quite childish and holds a grudge against Bernkastel for finally beating her in their last game, she actually cares for Bernkastel. She is also known as the Witch of the Absolute and The Most Powerful Witch in the Universe before losing to Bernkastel. She is the most powerful witch next to Bernkastel, and is feared by most other witches, including Beatrice. Her "Magic of Certainty" allows her to kill anyone without fail, as an absolute result.