Ki Huihyeon 기희현 is the leader, main rapper, and lead dancer of Dia.
Huihyeon was born on Friday, June 16, 1995, in Namwon, North Jeolla.
She was born in the Chinese Year of the Pig. Like fellow member Eunchae, she’s a Gemini. Her blood type is O. She’s 166 cm or 5'5½" tall, like Eunice and Chaeyeon.
She’s a former Woollim Entertainment trainee. In December 2015, she temporarily withdrew from Dia to represent MBK Entertainment on Mnet’s survival show “Produce 101,” having signed a contract with the show before her debut. She was eliminated in the finale, placing nineteenth overall in the competition. She originally debuted under the stage name "Cathy" but has since promoted under her real name after re-joining Dia.
She’s a member of the Dia sub-unit BinChaeHyunSu.
She plays the piano. Her hobby is buying clothes.