"Just fine with being worst dresser".

On the red carpet seremony, Koo Hye-seon is known to wear slacks rather than dresses!
She took time to explain this in her interview.

Wearing outfits that aren't too masculine of feminine, a blogger said that he doesn't care what she wears just that she does her best as a producer and an actress.

Koo said that she never was invited to these film festivals as an actress but as a producer or a director for her short films. Thus, she thought that a dress would make her overdressed to be invited as a director.

This was more comfortable for her. She was able to talk and network with other directors more freely in her outfit in after parties.

And on the red carpet, her fans who came to see her were more friendly and personal when they approached each other.

Source: news.nate.com+ hancinema.net