The man central to blocking investigators from arresting South Korea's impeached President Yoon Suk Yeol has come under the spotlight himself in the political crisis sparked by Yoon's brief declaration of martial law last month.

Hundreds of South Koreans, bundled up against freezing temperatures and snow, rallied overnight into Sunday near the residence of impeached President Yoon Suk Yeol, calling for his ouster and arrest,

A warrant has been issued for President Yoon Suk Yeol's arrest - but he's currently avoiding detention by remaining holed up in an official residence.