Competing at her second Olympic Games, Emilia Mikue Ondo was the sole female athlete for Equatorial Guinea at these Games and was 23 at the time of the quadrennial event. She qualified for the Games through a wildcard place because her quickest time during the qualification period of 2 minutes, 15.72 seconds, recorded at the 2007 World Championships in Athletics, was 14.42 seconds slower than the "B" qualifying standard for her event, the women's 800 metres. Mikue Ondo was drawn in heat four on 15 August, and finished sixth (and last) of all the runners who completed the event, with a time of 2 minutes, 20.69 seconds. She finished 39th out of 40 finishers overall, and did not advance into the semi-finals after being 16.84 seconds slower than the slowest qualifier.