Krugger said: First time ever heard them say Keine was not feminine
It's because of the way she speaks in Japanese. She may look (and even act, sometimes) feminine, but her manner of speech is more like a guy's (at least in fandom). Kinda like how Sakagami Tomoyo from Clannad speaks.
You... Who are you?I'm...She is Komeiji Satori, a friend of mine.Ah! So you're the underworld youkai who's been coming to the surface recently.S: The pleasure's all mine.She's not particularly feminine, is she?I'll be going home, then,but don't go pushing yourself, Rinnosuke!K: Pleased to meet you.Satori, this is Kamishirasawa Keine, a regular customer of mine.