“Is the person Paul describes in Romans 7:14-25 saved?”
The passage referred to in Romans 7 is the one in which the apostle Paul begins by saying, “I do not understand my own actions. For I do not do what I want, but I do the very thing I hate” and ends by posing (and answering) the question “Who will deliver me from this body of death?”
I cannot see how this person can be anything but a believer.