Koba is a highly intelligent bonobo. He has green eyes, but his left is blind and white, and he has black fur. He is the advisor and close ally of the king of the apes in the Ape Colony in Muir Woods, Caesar, a chimp. Koba can do sign language and speak fluently due to being exposed to ALZ-113, a cure for Alzheimer's, causing a pandemic to kill 99% of humans. He was abused and tested on by humans in the past, being delusional. He hates them, though he does try to be compassionate to other apes.