It was a series of scenes without any lines. He set Mijin to be a character that does not express any emotions.

In the first place, she couldn't be called a 'character'. The Mijin in the story was nothing but an illusion that Jungho saw.

There would be no crossing the barrier between life and death like in the film 'Ghost', nor would there be any resentful ghosts making a ruckus like in 'The Exorcist.'

Mijin's role was to simply stand there like a tree.

In the beginning, he used a different storyline progression. He intended to insert flashbacks of Jungho and Mijin being happy together and tried to change the atmosphere of the film by bestowing Mijin emotions halfway through the story.

However, he removed all those scenes when he revised the storyboard. He set it so that memories of Mijin only appeared through Lee Jungho so that the words Jungho uttered would form the human known as Mijin. As such, Mijin had to be beautiful. The only Mijin Jungho could see should be the one in his memories, without any objectivity at all. She was supposed to be a woman completely made from Jungho's delusions.

There wasn't any information that told what kind of person Mijin was in the film. He excluded all of them. He also removed any photos. Jungho's words...