Who are the main characters in 'the captive true story'?
If it's a story about a kidnapping, the main characters would likely be the victim (the captive), the kidnapper, and maybe the police officers or family members involved in the search and rescue. In a story about a historical captivity like a prisoner of war situation, it would be the prisoner, the guards, and perhaps fellow prisoners or military personnel on the side of the captive.
Since there is no more information about this 'the captive true story', the main characters could be various. For instance, if it's a story about a captive in a foreign land during a war, the main characters could be the captive soldier, the enemy soldiers who held him captive, and the comrades who tried to negotiate his release. Another possibility is that if it's a story about a captive in a domestic abuse situation, the main characters would be the victim, the abuser, and maybe a neighbor or friend who eventually helped the victim escape.
As I don't know the specific 'the captive true story', I can't say for sure who the main characters are. It could be the captive themselves, the captor, or people involved in the rescue or the events related to the captivity.