In terms of plot, what was Dana's purpose and reason for being there? Everyone else has their dramatic moments, but she just has a few lines and then misses most of the second half.
It feels as though she had a bigger part that got taken back, or was just part of what Spielberg saw as the typical family of the time? Putting a teen in to fill a gap between the parents and the kids. Or a reaction to all the horror/slasher stuff that was made at the time?
Her sole purpose seemed to be the one one moment which is shown in all the trailers when she returns home as the Freeling house is being sucked into the vortex.
She screams, "WHAT'S HAPPENING!"
That brief moment makes it seem as though she has a major role in the film which she doesn't. At the beginning she fills the role of rebellious teen-ager in contrast to the sweetly innocent and angelic Carol Ann.
Dominique Dunne did a good job with the little she was given. May she rest in peace.
Yeah, I thought that was memorable too. She was a typical teenager, more interested in being away with her friends. Seemed real in that regard. At least she wasn't annoying the way the middle kid (Robbie) was.
Dana's presence shows signs that the Freelings weren't always the stable family unit that they currently seem: she's noticeably older than the two other kids, and fairly old even in comparison to her mom Diane (if Diane is 35 and Dana is 16, that means she had her when she was 19 at the latest). Dana also looks a little different from the rest of the family and could possibly be a stepdaughter.
Throughout we're shown signs that Diane harbors regrets about her family life. She openly misses the days when she and Steve were carefree pot-smoking hippies, to the point where she isn't alarmed at discovering bizarre supernatural activity in her house but rather excited, and instead of getting out (even temporarily) they stick around and end up getting their youngest daughter kidnapped.
The moral of the story is to not let regrets about your past take away what you have in the present. It's important to the story that Diane be the one to go in and rescue Carol Anne, showing she's let go of her lost youth and fighting for the family she loves.