First & foremost, I would like us all to take a moment to pray for victims & perpetrators of rape; we all need God's grace to pull from evil actions & desires.
Maria Goretti comes to mind; she was nearly raped before being murdered. This doesn't give a direct answer to your question, because she wasn't actually raped, but being murdered is far worse. Rape is survivable, and people can (and often do) come out stronger in the end; murder ends everything for a person.
The question isn't, "Will God keep me from harm?", because a look at the central image of Christianity (the Crucifix) reminds us that there is some sort of purpose to suffering, and the Cross, the Book of Job, the Book of Judith, and other places remind us that suffering isn't necessarily the result of sin, but can be something to strengthen us & bring out the best in us.
Consider this piece of the story of St. Maria Goretti (from
Who is St. Maria? | Pilgrimage of Mercy):
"Finally, after many months of this, Alessandro forced himself upon Maria in an attempt to rape her. Though she prevented him from violating her, Alessandro brutally stabbed her numerous times. Maria died the next day in the midst of horrendous infection brought on by her lacerations. Her last words were, “I forgive Alessandro Serenelli … and I want him with me in heaven forever.”
During his prison sentence Maria appeared to Alessandro and forgave him. That act of mercy and forgiveness—that act of love—filled Alessandro with contrition for his crime. It was also a turning point for him where grace entered his heart. From that point on, he lived a beautiful and converted life of holiness, eventually becoming a Franciscan lay brother."
Maria's appearance to her murderer Alessandro was in a dream, while he was imprisoned:
Alessandro remained unrepentant for his actions until he had a dream that he was in a garden. Maria was there and gave him lilies, which immediately burned in his hands. When he woke, he was a changed man. He repented his crime and living a reformed life. When he was released 27-years-later, he went directly to Maria's mother and begged her forgiveness, which she gave, saying, "If my daughter can forgive him, who am I to withhold forgiveness?" (St. Maria Goretti - Saints & Angels - Catholic Online)
I would also like to include the letter from Alessandro at the end of his life; consider how all of this ties in with the Christian mystery of redemption. This evil was allowed to happen to Maria, but through her faithfulness to God, greater good came out of it. This is why the Crucifix is so important in Christianity; we must always remember that God will bring greatness out of every suffering, if only we give him the chance.
Alessandro's letter is as follows:
"I'm nearly 80 years old. I'm about to depart.
"Looking back at my past, I can see that in my early youth, I chose a bad path which led me to ruin myself.
"My behavior was influenced by print, mass-media and bad examples which are followed by the majority of young people without even thinking. And I did the same. I was not worried.
"There were a lot of generous and devoted people who surrounded me, but I paid no attention to them because a violent force blinded me and pushed me toward a wrong way of life.
"When I was 20 years-old, I committed a crime of passion. Now, that memory represents something horrible for me. Maria Goretti, now a Saint, was my good Angel, sent to me through Providence to guide and save me. I still have impressed upon my heart her words of rebuke and of pardon. She prayed for me, she interceded for her murderer. Thirty years of prison followed.
"If I had been of age, I would have spent all my life in prison. I accepted to be condemned because it was my own fault.
"Little Maria was really my light, my protectress; with her help, I behaved well during the 27 years of prison and tried to live honestly when I was again accepted among the members of society. The Brothers of St. Francis, Capuchins from Marche, welcomed me with angelic charity into their monastery as a brother, not as a servant. I've been living with their community for 24 years, and now I am serenely waiting to witness the vision of God, to hug my loved ones again, and to be next to my Guardian Angel and her dear mother, Assunta.
"I hope this letter that I wrote can teach others the happy lesson of avoiding evil and of always following the right path, like little children. I feel that religion with its precepts is not something we can live without, but rather it is the real comfort, the real strength in life and the only safe way in every circumstance, even the most painful ones of life."
Signature, Alessandro Serenelli
