Ian is a mathematician who survived the incident at Jurassic Park. The governement made up stories to cover up for what happened, making Malcolm and the others look like they were crazy. Ian is asked to go to Isla Sorna by John Hammond, and he refuses until he learns that his girlfriend, Sarah Harding is there already. He leaves with the team to get her back. Once again he knew things would go wrong before they did. This time around he's the leader, rather than just along for the ride.

Eddie is a part of the team sent by Hammond. He is in charge of the field equipment that they use, and comes along as the offer to see living dinosaurs is too good to pass up. Eddie later dies as a hero saving Ian, Sarah, and Nick from the trailers.

Nick Van Owen is a professional photographer sent to get photographs of living dinosaurs, in the hope of getting the island to be preserved and the dinosaurs left alone. He was also an enviornmentalist and released the dinosaurs that were caught by Ludlow's team.

Sarah is a paleontologist and wildlife expert sent to help with the documentation team. She didn't think it would be too dangerous, as she spent many years working with predatory animals. Ian tries hard to convince her to leave, although she wouldn't listen.

Peter is John Hammond's greedy nephew, who took control of InGen after a little girl was attacked on a cruise. He has plans of taking the dinosaurs off of Isla Sorna and using them in San Diego. He learns that he was wrong, after the T-rex gets loose in the city. Unfortunately for him, it was too late.

Roland is an experienced hunter, and seems bored because he has killed almost every game animal possible, and now there is no challenge left for him. He comes to Isla Sorna to help capture one of the greatest predators of all time and recieve the greatest possibe trophy. The legendary Tyrannosaurus Rex.

Deiter is there to assist Roland and the team. He's not fond of animals, and is a very cruel man. It seemed justice came when he met a group of compsognathus, while taking a bathroom break.

Kelly is Ian Malcolm's daughter. She feels like he's ignoring her, and when he says he's going on an expedition but she can't come along, she sneeks her way into the trailer and gets to the island.

Ajay is a good friend of Roland, and they were hunting partners. He convinced Roland to come along with him to Sorna for the ultimate hunt.

Dr. Robert Burke

Burke is an annoying paleontologist, who came along with InGen to help identify the dinosaurs. He and Sarah don't get along too well, because of their conflicting opinions.

John Hammond

John Hammond has gotten older since the accident, and now understands that the dinosaurs cannot be controled. When his nephew takes control of InGen and decides to try to bring the dinosaurs back to the mainland, he gets a team of experts to stop them. His goal now is to keep Site B preserved and allow the dinosaurs to roam free.