[1] She served as a member of the National Assembly of Benin, representing the 16th Constituency of Cotonou, for six consecutive terms from 1999 until her retirement in February 2019.

[7][8] Soglo, whose real name was Rose-Marie Honorine Vieyra,[3] was born on 7 March 1934[9] in Ouidah, French Dahomey, into a wealthy family from the city's Afro-Brazilian community.

[3] Their second son, Ganiou Soglo (born 1961), a former government minister and presidential candidate, was shot and wounded in an ambush on 5 February 2021.

[7] They were finally allowed to return to Benin to attend the national conference in Cotonou in February 1990, which marked the country's transition to democracy.

During her time as deputy, Rosine Soglo became a vocal critic of some major policies introduced by Presidents Mathieu Kérékou, Thomas Boni Yayi, and Patrice Talon.

[16] However, during the 2011 elections, she joined the Union Makes the Nation coalition and promised to improve the quality of Benin's government and habitability.

[18] Beginning on 19 May 2015, Soglo began presiding over debates as the Dean of the National Assembly, a role given to the oldest member of the legislature.

[1] In 2019, Célestine Zanou, a politician and former presidential candidate, praised Soglo as "our national mother" and called her an "icon of Beninese politics.

"[1] In late July 2021, Rosine Soglo was hospitalized for three days at the Mahouena Clinic in Cotonou for treatment of a cardiovascular illness.

[1][3][11] She was survived by her husband, former President Nicéphore Soglo, who was abroad in Paris for medical treatment at the time of her death, and their two sons.

"[1] Her eldest son, former Cotonou mayor Léhady Soglo, announced that he would return from exile in France for the first time since 2017 to attend his mother's funeral.