Question: What was the nickname of the Brazilian heiress that signed the Lei Aurea?

Context paragraphs:
Gérson's law: In Brazilian culture, Gérson's Law (Portuguese: "Lei de Gérson") is an adage which reflects the way Brazilians behave towards themselves, immortalizing concepts such as jeitinho and malandragem.  In short, Gérson's Law is taking advantage of every thing and every one and having no concern for ethics.

Isabel, Princess Imperial of Brazil: Dona Isabel (English: Isabella; 29 July 1846 – 14 November 1921), nicknamed "the Redemptress", was the heiress presumptive to the throne of the Empire of Brazil, bearing the title of Princess Imperial.  She also served as the Empire's regent on three occasions.

A Força do Querer: A Força do Querer (English: Edge of Desire) is a Brazilian telenovela produced and aired by Rede Globo.  It is created by Glória Perez, and directed by Rogério Gomes and Pedro Vasconcelos.  It premiered on 3 April 2017, replacing "A Lei do Amor" at the traditional 9 pm timeslot.

Brazil–United States Treaty: The Brazil–United States Treaty was a military assistance agreement signed in 1952 in Rio de Janeiro between the two countries, with the goal of defending the Western Hemisphere.  Military relations between the United States and Brazil date back to World War II, when Brazil supported the Allied effort in the invasion of Italy in 1942.  Brazil provided troops for the invasion.  On January 3, 1952, The Brazilian government issued decree 30363 establishing new government regulations.  These new regulations allowed for the return of foreign capital that was invested in Brazil and profit remittances on that capital.  Shortly after, representatives from the United States and representatives from Brazil started to negotiate a bilateral military assistance agreement in Rio de Janeiro on January 3, 1952.  The document outlining the agreement between the two countries would be signed on March 15, 1952.  The agreement went into effect on May 19, 1952.  During the time of the negotiations, Major General Charles L. Mullins, Jr. negotiated a separate military plan with the Brazilian Government.  The plan was approved on March 14, 1952 by the Secretary of Defense Lovett.  In a private ceremony on March 15, 1952 United States Major General Mullins and Brazilian General Monteiro signed the military plan that outlined a common defense between the two nations.  The agreement allowed major weapons and training by the United States military to the Brazilian military.  This tenuous alliance governed the two nations bilateral ties during the events of the Cold War.  However, the alliance was short lived, and suffered several major blows between the two nations during the military coup in Brazil in 1964.  During this time the United States still provided military support and training to the side that supported the United States.

Lei Áurea: The Lei Áurea (] ; English: Golden Law ), adopted on May 13, 1888, was the law that abolished slavery in Brazil.  It was signed by Isabel, Princess Imperial of Brazil (1846–1921), an opponent of slavery, who acted as regent to Emperor Dom Pedro II, who was in Europe.

Francisca Queiroz: Francisca Vaz Queiroz (born September 4, 1979) is a Brazilian television and film actress.  She played the lead role, Catarina, in the television series A Lei e o Crime.

Justicia umbrosa: Justicia umbrosa (Brazilian plume, yellow jacobinia; syn.  "Adhatoda umbrosa" Ness, and "Justicia aurea" Schltdl. ) is an ornamental shrub native of Cerrado vegetation of Brazil.  This plant may be propagated by herbaceous stem cutting, and it can usually get to 1,50 - 2,50 m tall.  They flourish in the shade, and will not do well if overwatered.

Pixote: Pixote: a Lei do Mais Fraco (] , lit.  "Pixote (small child): The Law of the Weak") is a 1980 Brazilian drama film directed by Héctor Babenco.  The screenplay was written by Babenco and Jorge Durán, based on the book "A Infância dos Mortos" ("The Childhood of the Dead Ones") by José Louzeiro.

Velho Chico: Velho Chico is a Brazilian telenovela produced and broadcast by Rede Globo that premiered on 14 March 2016, replacing "A Regra do Jogo" and ended on 30 September 2016, being followed by "A Lei do Amor".

Brazilian Women's Articulation: The Brazilian Women's Articulation (in Portuguese Articulação das Mulheres Brasileiras) is a Brazilian feminist organization that links women's organizations in Brazil's 26 states and its federal district.  It was created to organize the Brazilian feminist movement's preparation and follow-up to the 1995 Beijing Women's Conference.  In 2008, the AMB organized video conferences in order to publicise and promote awareness of the Lei Maria da Penha, a Brazilian anti-domestic violence law.

Supporting paragraphs: Lei Áurea Isabel, Princess Imperial of Brazil
Answer: "the Redemptress"