Step 1: What is asked.
We need the new role given to Deepika Padukone by the Indian Government.
Step 2: Her work.
Deepika Padukone has long spoken openly about mental health, and she runs a foundation for it.
Step 3: The appointment.
Honouring this work, the government named her as the country's first Mental Health Ambassador.
Step 4: The purpose.
The role is to lead national campaigns that spread awareness and reduce stigma about mental health.
Step 5: Remove others.
Tennis ambassador, ministry consultant, and Olympic association president do not fit her appointment.
Step 6: Conclusion.
So she was appointed as the first Mental Health Ambassador.
Answer: First Mental Health Ambassador