The 7th King of Joseon. As the second son of King Sejong, he was the younger brother of King Munjong and the uncle of King Danjong. Although he was originally low in the line of succession, he seized power through the Gyeyu Jeongnan and ascended to the throne after threatening the position of his nephew, Danjong. All kings who reigned after him were his direct descendants, leading him to be considered a restorative progenitor of the Joseon Dynasty.

A politician, scholar, and diplomat of the early Joseon period.

A Neo-Confucian scholar, powerful official, and royal relative by marriage during the early Joseon period.

A civil official, politician, and writer of the early Joseon period. Alongside his close friend Han Myeong-hoe, he played a key role in the Gyeyu Jeongnan. He was recorded as a meritorious official for both the coup and the stabilization of the throne, eventually serving as the Left State Councillor.

A civil official and scholar of the early Joseon period. During Sejong's reign, he was a technical bureaucrat who contributed greatly to cultural and scientific developments, including the Hunminjeongeum Haerye. After Sejong's death, he opposed the tyranny of Chief State Councillor Hwangbo In and, after being demoted, joined Grand Prince Suyang's faction to stand at the center of power.

A civil official and scholar of the early Joseon period. He is the most representative figure among the Sayuksin (six martyred ministers) who lost their lives while plotting the restoration of King Danjong.

A civil official of the early Joseon period and one of the Sayuksin.