Rokudo manages to reach the roof and attempts to stop Ranna from hurting Otohime. When he does, he's forced to confront a question he's been avoiding all along: What if she doesn't want to stop?
That's because it's the symbol of 
her friendship with Otohime-san.
.ذلك لأن ذلك رمز صداقتها مع أوتوهيمي-سان
Denn dieses Holzschwert
La espada es el símbolo
de su amistad con Otohime.
La espada es el símbolo
de su amistad con Otohime.
Parce que ce sabre
Perché quella spada è la prova
Porque a espada é o símbolo de
sua amizade com a Otohime-san.
Потому что он