The best, fastest and safest way to help a rape victim is seeking professional help.
Sure most rape victims hate this idea but this is for their own good. The longer they try to hold it in, the longer they will be scarred in life and will most likely affect their personality and how they think. It is always best to consult for professional help because they have the expertise and experience in handling such situations. Being physically and emotionally supportive for the rape victim almost always only work temporarily