Theresa Ruiz is a nurse living in Detroit, Michigan, where she works at Detroit Receiving Hospital. When Richard Dragon and Benjamin Turner moved to Detroit in pursuit of the Circle of Six their apartment was across the hall from Theresa's and she and her son befriended them.
- In her initial appearance Theresa introduces herself as Theresa Cruz but in all subsequent appearances her last name is given as Ruiz.
- 7 Appearances of Theresa Ruiz (New Earth)
- 2 Images featuring Theresa Ruiz (New Earth)
- Quotations by or about Theresa Ruiz (New Earth)
- Character Gallery: Theresa Ruiz (New Earth)