Mamie Ida Hall was born in 1923, she married James Edward Ritter on 22 Dec 1943. Her parents were John Anderson Hall b. 1892 Isle of Wight, VA and Louvenia Chapman b. 1893 Isle of Wight, VA.
John Anderson Hall was the son of Robert Hall and Ida Johnson of VA. Roberts parents were Archer Hall b. 1843 in VA and his wife Manda.
Louvenia was the daughter of Nero and Agnes Chapman. Nero was the son of Mike and Winney Chapman.
All of these people are identified as colored or black. None are identified as Native American.
In order to "get her tribe" you would have to figure out if one of these ancestors was actually Native American or at least part Native and go from there.