Can women be swamis in hare krishna?
It is certainly rare, but then again Vaishnava tridandi-sannyasa is also quite rare for men as well as women, having been reintroduced by Bhaktisiddhanta Saraswati Thakur less than 100 years ago. In the Chaitanya Sarawat Math, Srila Govinda Maharaja has accepted just one lady as a sannyasini — Bhakti Lalita Didi. Other women have come forward asking for a similar connection, but as far as I know they have all been refused. So it is extraordinarily rare, though not unprecedented.