This is a dangerous form to find her in or provoke her into changing into. she only takes it when she feels like her body or the souls she takes care of are in danger and will do anything in her power to eradicate the problem and protect herself and the souls she guards.
in this form she has two added tails. her claws get longer and all around shes much sharper. Her mind is clouded with only one thought "protect the souls" and its hard to calm her down once shes in this state.