I'm not sure if there is a proprietress in Dumenchong Grilled Fish Restaurant (Guijie Street) in Beijing. However, according to some netizens' comments and reports, there was once a female proprietress who participated in the operation of the store, but the specific situation may be different due to factors such as time and personnel changes. If you need to know more about the store, it is recommended to consult the store directly or experience it in person.