Step 1: What is asked.
We need PNB's first ever female brand ambassador, named in December 2025.
Step 2: Why athletes.
Banks often pick sports stars to build trust and connect with young, sports loving customers.
Step 3: The aim.
Punjab National Bank wanted a sporting icon who shows strength and leadership.
Step 4: The choice.
Harmanpreet Kaur, the captain of the Indian women's cricket team, was named as the bank's first female brand ambassador.
Step 5: Remove others.
PV Sindhu, Smriti Mandhana, and Mithali Raj are not the answer for this appointment.
Step 6: Conclusion.
So the answer is Harmanpreet Kaur.
Answer: Harmanpreet Kaur