Her father was a physical education teacher, and began to coach Ngarlemdana as she took up judo from the age of five.
[1] She began to prepare for the 2012 Summer Olympics in London, United Kingdom, by travelling to the International Center of African Judo in Algiers, Algeria, to train from March 2011 onwards for the following 20 months on a scholarship.
[1][2] She was one of three members named to the Chadian team, alongside Hinikissia Albertine Ndikert and Haroun Abderrahim.
[2] She competed in the Women's -70 kg tournament at the Games, facing British judoka Sally Conway in the first round.
[4] Ngarlemna was the winner of a club level international tournament held in Cergy, Paris, France in 2016.