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.
Yes. And that is why we must not interfere 
too heavily in human affairs.
أجل. ولهذا السّبب يجب ألّا نتدخّل
كثيراً في شؤون البشر
Ja. Deshalb dürfen wir uns nicht zu sehr in
die Angelegenheiten der Menschen einmischen.
Sí. Por eso no debemos interferir
demasiado en la historia humana.
Sí. Por eso no debemos interferir
demasiado en la historia humana.
Oui.
Sì. Per questo non dobbiamo interferire troppo 
con la storia degli umani.
Sim, e é por isso que não devemos interferir
tão intensamente na história dos humanos.
Да. Поэтому нам нельзя вмешиваться
в человеческую историю.