Ravan was the older sister of both Kimiya and Tamara. She was an outstanding mage, one who aspired to be even better, to be considered among the greatest of mages. Eventually, Ravan, having trained and pushed her magic too the highest level sort to go higher and, was subsequently absorbed by an element, making her a human elemental—a Devoured. While her parents, particularly her father, was initially so proud of her that they encouraged her younger sisters to be more like her, she became a touchy subject after the incident, such that neither of her parents would even mention her anymore.
During her younger sister Tamara's first year at the Magisterium, she told her friends Call and Aaron bits of information she knew about devouring, and being devoured by, elements through her experience with Ravan. She was later prompted to tell them the whole truth about her.
In Tamara's Bronze year Ravan finally meets her sister. She meets Tamara when she and her friends, stray down where the elementals are kept.