DeeDee the Monkey (Rin-Rin in Japanese) acts as the protagonist's primary companion and moral anchor. She witnesses his birth from a stone and later sees his courageous dive through a treacherous waterfall, which leads to his coronation as king of their monkey tribe. After his rise to power, DeeDee voices concern over his growing arrogance, especially when she tells him about human existence and their perceived superiority. This fuels his insecurity and drives his quest for greater power. Her loyalty remains steadfast during his imprisonment beneath the Five Elements Mountain, where she selflessly tends to him despite harsh conditions. When she nearly perishes in a blizzard, the compassionate intervention of the enlightened being Kanon saves her and heralds Prince Amat's arrival. Amat later frees the protagonist. This marks a turning point, as DeeDee's unwavering care contributes significantly to his gradual humility. During Prince Amat's pilgrimage, DeeDee actively participates in key conflicts, showing courage and resourcefulness. She accompanies the group through dangers like the Flaming Mountains, assisting in retrieving the magical Basho-Sen fan from Queen Gruesome. Her actions prove critical in pivotal battles, freezing Queen Gruesome and aiding in defeating King Gruesome by solidifying lava with the fan. DeeDee's relationship evolves from supportive companion to a central influence in his redemption. Her distress over his initial arrogance and later joy at his transformation highlight her role as his emotional compass. The narrative concludes with their reunion and marriage, symbolizing his full integration back into the community and the resolution of his character arc. Exclusive to this adaptation, DeeDee embodies themes of enduring loyalty and compassion's power to catalyze personal growth. Her presence consistently reinforces the protagonist's connection to his origins and his eventual embrace of humility and wisdom.