Meicoomon's Importance: Meicoomon's transformation and instability were designed to symbolize the fear of losing control, reflecting both her role as the catalyst for chaos and Meiko's internal struggles. This duality made her one of the most complex Digimon in the tri. series.
Dark Themes: Coexistence is the darkest chapter in the tri. series, addressing themes of loss, despair, and the ethical dilemmas of sacrifice. These themes helped to mature the narrative, aligning with the DigiDestined's growth into adulthood.
Ominous Title: The title, Coexistence, refers to the struggle of finding balance between Digimon and humans, as well as between light and darkness. It foreshadows the conflict of whether coexistence is even possible under the looming threat of the infection.
Homages to the Original Series: The scene where the infected Digimon rampage through the real world pays homage to Digimon Adventure, specifically the battles in Tokyo. However, Coexistence portrays a more catastrophic and grim scenario, emphasizing the stakes.
Gatomon's Ultimate Form: Nyaromon's emotional struggle and Gatomon's devolution to her In-Training form marked a significant turning point. It highlighted how even the strongest bonds could be tested by overwhelming adversity.