"Son... will know... who... was... father. And what... Caesar... did... for us." Maurice is a gentle orangutan who communicates sparingly, possesses considerable intelligence even prior to his exposure to ALZ-113, and shows immense loyalty to his companions. Although he demonstrates compassion for other apes, he initially displayed a cynical and pessimistic attitude upon meeting Caesar. However, after Caesar introduced the ALZ-113 to the apes and guided them to liberation, Maurice became increasingly optimistic and insightful. As Maurice embraced his position as a teacher and council member in the emerging ape society, he also assumed the role of Caesar's primary advisor and trusted confidant. Despite this, he harbored doubts about the potential goodness of humanity, perceiving primarily their darker traits. However, when the apes met Malcolm's group, Maurice found himself intrigued, particularly by Malcolm's son, Alexander, and the two quickly formed a friendship. Through Alexander, Maurice gained insights into the human experience. This exposure softened his views, leading him to recognize the duality of human nature, which prompted him to support both the humans and Caesar during Koba's short-lived takeover of the ape colony. Maurice, being the gentlest of apes, seldom exhibits aggression or violence unless absolutely necessary. For instance, during the conflict with humans, he maintained a sense of sympathy towards them, yet he was prepared to take their lives to safeguard his own kind. As the war intensified, he became Caesar's most trusted advisor, serving as a calming influence while Caesar succumbed to fury and a desire for revenge following McCullough's murder of his family. Although Caesar's increasing ruthlessness put a strain on their bond, both remained unwaveringly loyal to each other in the end. Maurice's kind disposition enabled him to nurture the young human girl, Nova, whom he embraced as his adoptive daughter. Her presence positively influenced both Caesar and Maurice, enhancing Maurice's empathy towards humans and restoring Caesar's compassionate nature. When Caesar saved the apes and guided them to a new sanctuary, free from the human soldiers who had caused so much suffering, Maurice witnessed the quiet passing of his closest friend and leader. He vowed to look after Caesar's last surviving son, Cornelius, and honored his friend's legacy by documenting his life in a book, remaining loyal to him until the very end.