All of Azhaghu and Ravi's children have good manners and know how to behave properly. They all talk with kindness and respect so the other person is not hurt.
Whereas Poorna, is so annoying. She doesn't know how to behave. She acts as if she is already Ravi's wife and everyone has to listen to her. If she marries Ravi she will sit in one spot without doing anything and boss everyone around.