Sannan has been using materials left behind by Kodo to continue to try to improve the medicine in secret. He drinks the medicine and transforms into something which is no longer human. After seeing the wound Sannan infected on Chizuru heal in an instant, Hijikata asks her if she's a rasetsu, but...
Later, the commotion over Sannan adds to the decision to move the Shinsengumi headquarters to Nishi Hongwanji. Chizuru continues to search for her father, but she is unable to find any clues to his whereabouts. Then one day, Chizuru happens to overhear Okita's secret.
We will deal with all 
the false oni eventually.
سوف نتعامل مع كلّ الأوني المزيّفين في النّهاية
Wir werden alle falschen Oni
aus der Welt schaffen.
Tarde o temprano
lidiaremos con los falsos oni.
Tarde o temprano
lidiaremos con los falsos oni.
Les démons de pacotille
finiront tous par périr.
Prima o poi ci occuperemo di tutti i falsi demoni.
Lidaremos com os onis
falsos em seu devido tempo.
Мы истребим фальшивых демонов.