Bone Head
Mighty Blow
Thick Skull
Throw Team Mate
Richard B. Riddick (played by Vin Diesel), more commonly known simply as Riddick, is the fictional Furyan protagonist of a number of films, including Pitch Black, The Chronicles of Riddick, and The Chronicles of Riddick: Dark Fury.
Riddick stands around 6 feet tall. He has a muscular, athletic frame, and is extremely fit. His head is shaved. His eyes glow softly with a silvery whitish blue glow, due to his eyeshine. Riddick usually wears welding goggles during the day, due to his sensitivity to light.
At the outset of Pitch Black, Riddick is viewed by the other survivors as a dangerous, cold-blooded killer. There is some truth to this; however, Riddick is by no means psychopathic. He usually kills out of necessity, much like a predator, when he is threatened, but feels little if any restraint when doing so. He seems to have a diminished opinion of the value of human life. He also appears to have a certain sense of honour-when Johns, a bounty hunter who captured him, "nearly" shot him so that Riddick would remember the way it could have gone, Riddick grabbed Johns' gun and did the same thing, apparently to ensure he wouldn't be indebted to Johns in the future.
It is revealed that the primary reason for Riddick's cooperation in Pitch Black is that he believes he will be set free after they escape. He was willing to leave the other survivors stranded, so long as he would escape. However, he eventually went back for the survivors, showing a lighter side to Riddick's "anti-hero" mentality. At the beginning of the movie, a survivor asks why the escaped Riddick would return to trouble them, then Johns states, "to work your nerves, or to take what you've got." Therefore, at the end of the movie, it appears he was simply trying to make it hard on Fry by initially presenting her the choice of whether to come with him or stay with the others.
Riddick is a brave individual; he is often willing to enter combat against unfavorable or even seemingly impossible odds, as evidenced by his facing one of the native creatures in Pitch Black even after almost everyone else who encountered them had been killed. He also escaped twice from Triple Maximum Security prisons. He has also instigated prison-wide riots and fought the Lord Marshal of the Necromongers, who is, considered by many, a quite formidable adversary. He is stealthy, always on his toes, and prefers to attack from the shadows.
He does have the capacity to care about others, although he doesn't show it often. The most obvious example of this is seen in his father/daughter relationship with Jack, a.k.a. "Kyra"; and his visible pain at her death in the last movie.
Riddick is apparently quite intelligent, and much more observant than most humans; in the film The Chronicles of Riddick, he quickly deduced almost exactly how a battle between a group of mercenaries and prison guards happened after the fact. He can also calculate how people can and will behave, after gathering enough information about them. After Riddick escapes in the opening of Pitch Black, he places his handcuffs on one side of the crash site, then heads in the opposite direction to confuse Johns, who has been chasing (and had recently captured) Riddick. Johns, being used to Riddick's trickery, knows what he is trying and heads in the right direction after Riddick anyway.
Riddick also seems to have a good knowledge of human anatomy and perhaps even xenobiology; he knows all the most lethal places to strike a human with a blade, and he is able to determine that the Grues, the antagonistic, nocturnal creatures in Pitch Black, have a blind spot by looking at a skeleton of one in the desert.