O Kuk-ryol

Under Kim Jong-un O Kuk-ryol took part at a meeting of top leaders held immediately after Kim Jong Il's death on 17 December 2011 to plan the funeral and succession. He was a member of the Kim Jong-il funeral committee. As a Kim loyalist, speculations named him as a possible successor of Kim Jong Un, and the regime appeared to be purging O's protégés in January 2011 to prevent him from being a threat to Jong-un. After the execution of Jang Sung-taek in December 2013, a powerful rival, O re-emerged as more of a public figure.

O died from heart failure on 9 February 2023, at age 93.

Family O was reported to have also involved members of his family, including his son O Se-won, in the counterfeiting business, which reportedly took place at the Pyongsong Trademark Printing Factory, a factory under the control of O's Operations Department.