Understand writers favourite maybe Shira but viewers connect to Raavi more
She is called dobi because some of her actions come across this way but her attitude and attempts towards others are indeed commendable compared to others in the house
She is the most understanding person in the house, she tries to understand everyone, when Rishita left the house, she understood her POV, she apologized to Dhara the next day, she is always their to console Dhara, she lets go all the taunts of Suman, she has broken her relationship with her family for Pandyas.
The writers have moulded Raavi in such a way that she is the one who will bind the family irrespective of how many times the camera focuses on Dhara at the end and whatever she says