Agatha Rowen

Agatha Rowen is Caspien's older sister and Zatana's aunt. After Caspien gets Runebound, she helps him get back to the water library.

Trivia

 * Agatha was born as a Water Scribe, but ran away from the Water Library as a kid. She taught herself Air Magic because learning Water Magic inolved being in water, and she's afraid of drowning.