Clarence is an altered orangutan who is an elder of Khan's tribe of apes in the Rocky Mountains. He was a disciple of Maurice during their time in Muir Woods and learned to devote himself to the tribe and give selfless counsel above all else. After the fighting between Caesar's colony and Colonel McCullough's troops caused the deaths of many apes, Clarence followed Khan, his tribe and the rest of the tribal elders to flee the fighting. After Khan's wife was killed by a solider and the tribe was confused on what to do, Khan turned to Clarence for advise on whether to seek revenge or seek peace.