Hide and Seek movie

I watch this movie once when I was 9 years old. I thought this movie doesn't make sense until Miss Mahani told us about split personality, I began to wonder does Hide and Seek movies closely to the split personality problem. So I open wikipedia to search the split personality movies, and I saw that Hide and seek was one of it. I was so shock. The story was about a father, David, and her daughter Emily just lost their beloved wife and mother on Christmas Eve . Since then,  Emily always talk about her imaginary friend Charlie. One day a woman visit their home. She saw a dead cat in the bath tub. Emily told her father that it was Charlie fault but he did not believe it until one day that Emily father recognize that he was Charlie. Then, after Charlie take control over David body and he began to kill Emily. At last, Emily were saved by Katherine , her aunt, Katherine killed Charlie by killing David. Katherine took Emily as her adopted daughter. After the incident, Emily draw a picture which contain Emily and Katherine . But the picture are a little bit spooky because Katherine had two head, just like before David alive, Emily draw a picture contains two David ( one Charlie and one David )