Guinevere

Guinevere is a Divine Ancestor and an associate of Leviathan, having participated in the ritual to restore her to health after her defeat at the hands of John Pluto Smith. Among Witches she is considered a Queen among Divine Ancestors. She is the reincarnation of Guinevere from which Queen Guinevere of Arthurian Legend was inspired, who was herself the reincarnation of an Earth Mother Goddess. What is known is that she is searching for the most mysterious of the Gods of Steel, the King Who Manifests at the World's End, who inspired the legends of King Arthur, and she possesses the Holy Grail, which was crafted by her in her previous life as a Heretic God, Gwenhwyfar. She is also allied to the Heretic God, Lancelot du Lac. (Source: Campione! Wiki)