Bucaphi

Bucaphi is a Genii of the Tenth Hour and the Genius of Witches. She is first mentioned in volume 11, Krusty, Tycoon Lord, but has yet to make an in-person appearance.

Synopsis
Bucaphi coincidentally met Krusty in the Prison of Time following Takayama Misa's weapon, Calamity Hurts, going awry. When he refused to become her servant, she placed a curse on him and sent him to the the Chinese server.

Because her curse prevents him from leaving the Eured continent, Krusty plans on searching for her and killing her to remove it.

Trivia

 * In the Nuctemeron, Bucaphi is the Genius of Stryges.