Aegis is 25 years old. She was partnered with Iodin from her recruitment until 2008, and then partnered with Riboflavin. Her response center is number 2818. Aegis and Iodin were the first two agents transferred from the DMS to set up ESAS in 2004. As such, Aegis is the senior ranking agent in ESAS.
Her mutant powers include the creation of energy shields, as seen when she defended Logan and Laburnum from a grizzly bear loose in the Cafeteria in 2006.