If the character is like malmal try to abduct her .
Anna has found out how beautiful nakku is. He is shocked. what if he fall for nakku and try to abduct her. subu will come in the middle and try to save nakku anna kill subu, nakku get shiver.
After datta rescue nakku from anna find out the beautiful nakku and also anna is trying to abduct nakku of her beauty so datta will become the protector of nakku.
He will also understand nakku hide her only for her protection. I am sure he will not bother about her beauty and promise her to protect nakku from anna at any cost. So it will bring them very close and he will become a shadow of nakku.
And he can close the mouth of kala that nakku fell into trouble because of me and I will protect her..
He behaves like old datta who try to protect supriya. But he will take extra care for nakku than supriya because nakku is his love he doesn't want to lose it at any cost.
If nakku gone out his site in mandir he will not send search party he will go and search her when he find her he will sure hug her say don't go away from my eye nakku. Always keep tight security for nakku.