Nobles' mother was a drug user, and the family lived in Monterey, California before settling in the Columbus, Georgia area.

She earned a Bachelor of Arts degree in politics and Master of Education in teaching from the University of Puget Sound.

She served as a member of the University Place, Washington School Board and was the president of the Tacoma Urban League.

[8] In March 2020, Nobles announced her candidacy for the 28th district in the Washington State Senate against incumbent Republican Steve O'Ban.

[16] Nobles voted in favor of HB 1054,[17] which is described as establishing requirements for tactics and equipment used by peace officers by adding restrictions on vehicular pursuits, as well as prohibiting law enforcement from using chokeholds, the deployment of tear gas, or unleashed police dogs in the arrest or apprehension of suspects.