The Possessing Spirit of Kyrenna will be non-agro and a ring event will need to be completed before she is attackable.
Upon entering the room, you will be charged by two A Possessed Minotaurs who upon dying will come back to life as An Enraged Possessed Minotaur. These will have to be burned down again and will come back to life as A Weakened Possessed Minotaur. After killing these they will once again come back as A Possessed Minotaur Spirit . Must stay in the room with Kyrenna after last Minotaur is killed or Kyrenna resets and you will have to start over.
Kyrenna will give life to the minotaurs after you kill them and when this happens one of the two has a tendancy to change targets and attack another member of the group, in our case it was usually the healer. Watch for the red text.
Kyrenna now becomes attackable.
This starts another ring event involving 4 different Kyrenna's