Sidonae was an E Pluribus Neo operative.
Before Awakening Edit
Theresa Moreton originally had a husband, the cheerful hotdog stand owner, Stanley Morton, but was killed by a sniper. In Chapter 10.2.2 in The Matrix Online, she helped EPN locate a phone line on an old restricted network in Downtown, which was wanted by all organizations.
She was then captured by the Machinists for assisting "terrorist activity". She wqas then rescued by the EPN leader, Kid during an operation. She has now been awakened, calling herself Sidonae and working with the organization that helped rescue her.