The subject appears to be Sylvia Rivera, a Puerto Rican transgender woman, who was a member of the various activist groups that Davies was also a part of. Rivera was a major participant in the Stonewall Riots. Rivera was born in 1951 and lived with her grandparents. Rivera's father was absent and her mother committed suicide when Rivera was three years old. She was beaten by her grandparents for wearing makeup and women’s clothing, so she ran from home at 11 and eventually met Marsha P. Johnson. She was part of groups like STAR and the Gay Liberation Front (GLF), which Diana Davies was a part of as well.
Rivera was a major player in the Stonewall Riots as well. In an interview, she debunked the myth that she threw the first Molotov cocktail at the police, but she takes credit for throwing the second. In a 1989 interview, she states, “Before gay rights, before the Stonewall, I was involved in the Black Liberation movement, the peace movement...I felt I had the time and I knew that I had to do something. My revolutionary blood was going back then. I was involved with that.” Rivera has always felt that she needed to stand behind other marginalized groups as well.

“Who Was Sylvia Rivera?” SRLP (Sylvia Rivera Law Project), 19 Feb. 2019, srlp.org/about/who-was-sylvia-rivera/.