Aloisy is the man who took over the master’s old apartment when the master was admitted to Dr. Stavinsky’s clinic. Woland makes him appear before them; Koroviev deletes Aloisy’s name from the apartment register, thus freeing the master and Margarita to live there again. Interestingly, Aloisy represents something of a loose end in the novel. In an earlier draft, Bulgakov had the master explain to Ivan. Homeless that Aloisy had reported him to the authorities for possession of illegal literature. This would have been an act motivated by getting the master’s apartment, justifying the way in which Woland subsequently turfs him out again.