Risley Law

Risley Law is a Mage of the Mermaid Heel guild as well as a member of its representative team in the Grand Magic Games. Risley employs Gravity Change as her type of Magic. This Magic allows her to manipulate the gravity affecting a person using it to changing her weight and allowing her to defy gravity and walk on walls. However this Magic wears off after a period of time and Risley reverts to her original form. Source: Fairy Tail Wikia