sentences:  As they reach the middle layer of Purgatory Rei senses her sister's soul and starts to forsake her friends, acting cold to them as all she cares about is getting her sister and even becomes cold to her pet dog, Thelema - who dies after she got angry at her.As they get closer and closer to Mirei's soul, Rei ditches the group and goes on her own, not caring about the rest of the group, and after defeating the two dog revenants who guard the towers to the second half of Purgatory, Thelema appears in front of Rei, now a revenant, and fuses with the guardians to form Therion and fights Rei.As Rei hesitates again, not wanting to fight her pet, her friends arrive and Rei apologies for her actions and the group kill Therion.