Ciel suspects Shiki of being the culprit and attacks him. After ascertaining his innocence, she reveals that Akiha instead may be responsible. Ciel then reveals details about the Tohno family's non-human nature; after this, Shiki confronts Akiha, whom explains the "Inversion Impulse", a tendency for members of the family strong with the non-human blood to drastically shift in personality towards murderous insanity, and that her true brother SHIKI had undergone it 8 years before. The connection formed between SHIKI and Shiki lingers today and gives Shiki visions of SHIKI, who is the real threat.