Goddess Ereshkigal from Sumerian Mythology. Very femenine, dignified and elegant. In this form, she's a Beast of Humanity, wielding the tittle of "Beast Null".

As the shy and kind Goddess of the Underworld, she originally possessed the body of the mage called Tohsaka Rin in order to to manifest, becoming a Lancer servant. However, in this form she fully accepted her role as Beast of Humanity, changing into Beast Class. She's determined to bring down humanity, in spite of her love for Master.