Pluto

Pluto is a main character and antagonist in Wes Craven's The Hills Have Eyes and it's sequel The Hills Have Eyes Part II.

Biography
Pluto is a prominent character in the original film thanks to Michael Berryman's physical appearance and is often named the icon of the series because of that. He is also the only character (aside from Ruby) to appear in a main role in more than one film in the series.

Attacking the Carters
In the first film, Pluto is one of Jupiter's sons along with Mars and Mercury. He is seen ransacking the Carter Family's camper with Mars, where he attempts to attack Brenda, but Mars pushes him away and attacks her himself. Pluto then takes Doug and Lynne's baby and he and Mars run away. Pluto radios his brother Mercury, who is watching the camper from the hilltops, and they discuss about their new meal. After they radio out, Mercury is killed shortly afterwards, which Pluto and Mars hear, but they dismiss it as they don't see it.

Come morning, Jupiter is outraged at Mercury's death and vows to kill the rest of the Carters. Pluto tags along with him, but is ambushed by the Carters' dog, Beast, who killed Mercury the night before. Beast bites out Pluto's achilles tendon, which incapacitates him. Beast comes back a minute later and bites out Pluto's throat before leaving him to die. However, as he states in the second film, Jupiter's older brother, The Reaper, finds him and patches him up, before they presumably leave the area, Jupiter and Mars are killed and Pluto's sister Ruby turns against the clan.

8 years later
Pluto and The Reaper then spend the next 8 years killing people who pop up in the area, dumping their bodies into the mine shafts in the hills, later cannibalizing them. Eventually, a group of potential victims arrive in the hills, one of them being Ruby. Pluto attacks Ruby in one of the buildings, revealing to her that he's still alive, before running off when her group approaches the building. Pluto then steals one of the group's bikes, to which he is chased throughout the hills by Roy and Harry. Harry is knocked off his bike along the way, which leaves Roy to persue Pluto on his own.

Roy eventually captures Pluto and tries to take him back to the group, but they find that Harry is dead and Pluto is saved by The Reaper, who then attacks and knocks out Roy. Come nightfall, Pluto attacks Ruby again and comes close to killing her, but Beast chases him away, but not before Pluto reveals to Ruby that their uncle is around.

Death
Pluto flees Beast for now, but when he corners an awakened Roy on a hilltop, Beast comes up behind him and pushes him off the hill to his death.