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.

[1] 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.

[2] In 2005 Choi earned her first call-up to the South Korean senior national team to compete at the 2005 World Fencing Championships.

She competed at the 2012 Summer Olympics in the Women's épée team event as a substitute.

This biographical article related to fencing in South Korea is a stub.