Byun Hui-su (June 11, 1998 – February 27, 2021[3]) was the first known transgender soldier in South Korea.

[4][5] She had risen to the rank of staff sergeant and was a tank driver before being discharged from the army in January 2020 after she underwent gender reassignment surgery in Thailand in November 2019.

Workers from Sangdanggu National Mental Health Center (where Byun received treatment) called for someone to check up on her as they hadn't been able to reach her since February 28.

The fire department arrived at Byun's house on March 3, and found her body at 5:49 pm KST.

[10] In April 2024, Ministry of Defense's Central Committee for Examination of Killed or Wounded in Action and Death or Injury in the Line of Duty decided to acknowledge that Byun died as a soldier on the line of duty, thus paved way to the possibility of Byun’s burial in a national cemetery.