Likewise, who is Iosefka imposter?
Imposter Iosefka is a special Healing Church doctor and possibly a member of the Choir. We find the Iosefka Celestial Emissary standing near the door that she barred the player from earlier in the game and when defeated she will drop Iosefka's Blood Vial.
Also, how do you get the umbilical cord in Iosefka? The second umbilical cord is at Iosefka's Clinic and it is one of two that are missable. In order to successfully get this you'll have to discover the back entrance to the clinic by going through the Forbidden Woods cave, and be sure not to kill or agro Iosefka (fight/make her mad) prior to killing Rom.
Also, what does Iosefka drop?
One of the Celestial Minion in Iosefka's Clinic drops Iosefka's Blood Vial upon death, possibly revealing the real Iosefka's fate. Iosefka's Threaded Cane is actually infused with a blood gem that grants her Slow Poison attack. The imposter Iosefka also has a Augur of Ebrietas and A Call Beyond.
Should I kill Iosefka bloodborne?
Ensure you do not kill off Iosefka or turn her hostile (by entering her inner sanctum or attacking her front door) before you complete the Rom, the Vacuous Spider boss battle. Return to the clinic after Rom is dead and the Blood Moon has risen to find Iosefka passive and defenceless on a gurney.