Zu Wan said something to Tristan before giving his daughter's hand to him.
"Tristan, I am leaving my daughter in your care. Protect her, love her and make her happy. If you make her cry, I will make sure that the fire dragons will hunt you down in all eternity."
Titania pinched Zu Wan's waist as they heard him threatening Tristan. Zhen-Zhen looked at her father helplessly while Tristan just let out a chuckle.
He was no longer afraid of Zu Wan, not because he already had power but because he knew that Zu Wan already accepted him as his son-in-law. Zu Wan sacrificed everything he had just to save Tristan's life.
"Father, you don't have to worry about that. I will fulfill your wish. I will protect our family. I will stay by her side and make her happy for the rest of our lives." Tristan reassured him.
Zu Wan nodded his head with a gentle smile on his face. He believed Tristan. He tapped his shoulder before allowing Tristan to hold Zhen-Zhen's hand.