Final answer:
In season 3 of 'Avatar: The Last Airbender,' Azula hallucinates conversations with her mother, Ursa, showcasing her mental breakdown.
Step-by-step explanation:
Near the end of season 3 of the animated series Avatar: The Last Airbender, Princess Azula begins to experience a significant mental breakdown. As she spirals into paranoia and instability, Azula starts to imagine conversations with her mother, Ursa, who is not actually present. These hallucinations mark a notable shift in Azula's character, underscoring her unraveling psychological state as she grapples with feelings of betrayal and loneliness.