Gibraltar is a subordinate of Weekend. she appeared in the anime episode 10

She has blond hair and wears a horned hat. She also appears to have magic connected to the element 'Earth' as she controls rocks for attacking when facing of with Honoka Takamiya and Ayaka Kagari, she seemed to have a large rock attached to her back which seemed to help her control the rocks. She is able to shape the rocks however she pleased and uses it for both attack and defense. However,it is noted that the rocks that she is in control of must be connected to the rock on her back. This might mean that she could not control other rocks.