Yun Hyok-seok (, October 7, 1984 - April 26, 2003) was a South Korean activist, poet and writer. He fought for human rights, civil rights, LGBT rights and peace. His nickname was Yook Woo Dang (), which means "six friends". He wrote using the names Sulheon(, ) and Midong(, , "Beauty Boy"), Donghwa(동화, 童花, Boy's flower), Roman Catholic baptismal name is Antonio.