Is the eight-character yin fire woman and yang fire man suitable?

It's not appropriate to say that directly. Also see XiShen, the couple's palace and so on. It would be better if the other person likes to use God. If you think it's good to be with the other half, then be together. Whether you are happy with ta and whether you can understand each other is the most important thing. If you think you can't get along and the eight characters can't be changed, then I won't say it.