**Rev 12:17 So the dragon was enraged with the woman, and went off to make war with the rest of her children, who keep the commandments of God and hold to the testimony of Jesus. **
So who do you think the dragon represents in Revelation?
It's not a matter of "think". Scripture tells us.
And the great dragon was cast out, the old serpent called Devil, and Satan, who deceives the whole world. He was cast out into the earth, and his angels were cast out with him. (Revelation of John 12:9)
I feel the important part of that scripture is what defines the "rest of her seed". In a nutshell, if the dragon wants a piece of you, then you are likely doing what Jesus wants you to do.
To addres a question you put to Ping-Pong, the woman is the Church of God. A cursory study of "playing the harlot" in the Bible will show you that Israel got busted a number of times for "playing the harlot". The woman, therefore, will be those who comprise the church that keep the Commandments of God and the Testimony of Jesus without accepting heresies or apostasies from other religions.
II Corinthians 111 I would that you were bearing with me a little in foolishness; but indeed bear with me.