A Succubus Demon Familiar with the ability to manipulate dreams, she was created by infusing the soul of a deceased human girl into the body of a cat.
Len entered a contract with Shiki Tohno in order to become his familiar. She is a Succubus Demon with the ability to manipulate dreams. She is capable of transforming into a cat. She rarely speaks, she thoroughly enjoys cakes and hates taking baths. After her Magus' death, Arcueid took care of Len. Since then she is only awakened at the same time Arcueid hunts vampires.
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