Dr. SchÃ n arrives . He talks as if Schigolch is Lulu 's father . She is visited by Schigolch , a tramp who seems to have featured in her past in some unspecified way and may even be her father Dr. SchÃ n arrives to ask Lulu to stay out of his life from now on , since he is engaged and it would be scandalous for them to see each other socially .