Is that where all the confusion's from? [Kaoru looks baffled, briefly distracted from her confusion over him talking like he's a sword to address this.]

No! Okita Souji is my father-- I'm Okita Kaoru! [She just gives him such a 'what is WRONG with you' look.] Okita Souji is a man. [She suddenly looks angry.]

Are you implying I'm so flat-chested you thought I was a guy!? My father!? [look the last time someone said something even remotely similar Kaoru chased them around with her sword for like 20 minutes and tried to stab them everyone is kind of lucky she's not immediately drawing her sword here.]