Wu "Supremacy Witch" Zetian
About
Wu Zetian is a witch invited to the Walpurgis. Titled the "Supremacy Witch," her desire is the "Heavens."
Wu Zetian swore to herself that she would ascend higher so that nothing can be taken from her again. She sees her opponents as inferior obstacles from becoming stronger and uses her anger to plow through it. She is also afraid of being looked down upon and thus is very arrogant.
Wu Zetian also often uses “We” instead of referring to herself as to represent that she is fighting for both Li Tian and herself, carrying his dream of becoming king.
(Source: Majo Taisen Wiki)