Wolverine is one of the most recognized characters in the Marvel Universe. His origin has changed a lot over time, but he has been depicted as being approximately 120 years old (born James Howlett in the early 1890s). His mutant abilities are an accelrated healing ability (which also has apparently slowed his aging), and extremely acute senses (he can track by smell and can see in near total darkness). The healing factor also gives him a much greater resistance to fatigue, and nearly unmatches agility and quickness (he was depicted as being able to effortlessly block punches from the ultra-quick Spider-Man).
Wolverine's most popular trademarks are his claws and skeleton, which have been fused with the near unbreakable metal adamantium. Not only does this make his bones and claws unbreakable, but it gives him a much harder punch or kick. During a brawl with Spider-Man, the web-slinger thought "I'm hitting him hard enough to wreck cars, and I can't get him to stop smiling...". He may not be the strongest, nor does he have superpowers on the level of many superheroes, but Wolverine is undoubtedly one of the deadliest mutants due to his raw energy, and feral rage that can overtake him when agitated. In many ways, he hates what he has become, and almost always has trouble with people. But Wolverine will fight to his last breath to defend the select few he can call his friends.
Major Alan "Dutch" Schaefer is the leader of the team and the protagonist of the first movie. Dutch is an elite veteran. He and Dillon served together in Vietnam during the Battle of Hu?. He is sent on a mission in Val Verde, under the belief that presidential cabinet members of Guatemala were kidnapped by guerrilla forces. After attacking the guerrilla's post, they discover that the men were actually CIA agents. It is also known that Dutch and his team fought in Afghanistan for a time as stated by Poncho. After the Predator kills all of Dutch's team and Dillon, and with Anna being rescued, he is the only man left in the jungle with the Predator. Using a knife and vines to fashion primitive weapons and traps including a spear (with the knife as the blade), and a bow with an explosive-tipped arrow made from a 40mm grenade, he covers his body in mud after discovering the Predator sees through infrared, essentially making him invisible. Though the Predator falls victim to a number of Dutch's traps, they fail to kill. Eventually, the Predator catches him and the two fight hand to hand. Despite his impressive physique, Dutch is no match for the Predator, only surviving when he manages to lure it into a trap where it is nearly crushed by a log. The beaten Predator then activated a self-destruct device for its suicide and to kill Dutch, but Dutch is rescued by the rescue helicopter that saved Anna. Dutch is referenced in Predators, when Isabelle says the creature they just saw matched the "detailed description" by the only survivor of the 1987 Guatemala mission.
http://en.wikipedia.org/wiki/List_of_characters_in_the_Predator_series#Dutch