Well, my interpretation would be, that due to the damage to the body caused by the suicide attempt Ji-Woon couldn't take her body back yet (risking the loss of "life" if it died), but switched to possess his boyfriend's body when he arrived to the scene in order to save her original body (now occupied by Su-In) from bleeding to death, hoping she could get that body back after its recovery. That is why the boyfriend (now possessed by Ji-Woon's spirit)is acting kinda weird and quoting the same replique as Ji-Woon's mother after her major "facelift" and change of behaviour earlier in the film. These lines are a representation of the fact, that the same vengeful spirit is now using the boy's body, hence the same figure of speach. And, of course, trying to keep her close to him, keeping her from leaving the country, in order to take her true body back in near future.
About the dilemma considering the "souls" of the possessed, I would tend to think it logical, that a living person's identity can be taken over by a wicked/restless spirit, without replacing the soul. These people are only used as tools or mediums in pursuit of succeeding in the true intention of taking the original body back. They don't need to be killed (in fact Ji-Woon's mum is still alive in the hospital after the spirit has exited her body), since they are only temporary hosts. The only one that has to die is the soul of Su-In, so that Ji-Woon's spirit could take over her own body and continue the life Su-In stole from her, and the quest would be completed.
I agree that Ji-Woon's spirit had been trapped in the dephth of the water in the river until the ouiza board session in the movie's beginning released it and brought it back. And she definetely considered her friends as traitors, so applied her own drowning death upon them. This was her first goal, the second, more important one being to get back her body and continue living in the real world instead of wanting to "rest in peace" and withdraw to the spirit realm. She was a wicked character already on earth, and the death and napping of her body made her menace grow beyond limits. Though dead, she was too greedy for life to let go of the material world, and this prevents liberation (and might lead to an eternal damnation of being trapped between two worlds without really belonging to either of them).
The part of Su-In's mother was anyhow left quite unexplained to me. I don't think she expressed hatred towards Ji-Woon's appearance in the alley because she thought she killed her daughter, though, as she is seen embracing Ji-Woon (or Su-In in Ji-Woon's body) after the body in the river was found, giving the impression she didn't know the true events of the fateful day. And the issue of the poisoned water leading to the preservation of the body might have some meaning too, but nevermind. Maybe I should have a second view or something...
reply
share