Abstract: A modular digital assistant that detects user emotion and modifies its behavior accordingly. The desired emotion is produced in a first module and a transforming module then converts the emotion into the desired output medium. The degree or subtleness of the emotion can be varied. Where the emotion is not completely clear, the virtual assistant may prompt the user. The detected emotion can be used for the commercial purposes the virtual assistant is helping the user with. Various primary emotional input indicators are combined to determine a more complex emotion or secondary emotional state. The user's past interactions are combined with current emotion inputs to determine a users emotional state.