|Born||February 28, 1986|
Gwangju, South Korea
|Height||169 cm (5 ft 7 in)|
|Weight||62 kg (137 lb)|
Choi first drew attention at the 2005 World Junior Fencing Championships where she won the silver medal in the women's individual épée, losing to Sophie Lamon of Switzerland 15–12 in the final. Next year, Choi became runner-up again at the 2006 World Junior Fencing Championships, losing to Tiffany Géroudet of Switzerland 15–11 in the gold medal match.
In 2005 Choi earned her first call-up to the South Korean senior national team to compete at the 2005 World Fencing Championships. After the 2006 Asian Games where she won silver in the women's épée team event, however, Choi was not regularly selected for the national team until the 2011 season.