Thread:Ignisha/@comment-66.110.225.46-20180207231942/@comment-1979284-20180520011951

Unfortunately, you were correct. This is because of two reasons:

1. The age of consent in Japan is 13, and while it is very rare, a relationship between a student and a teacher is not impossible. Of course, they would still have to wait until the student's graduation to actually take their relationship further and into public, but it can still happen. And as the manga originated from Japan, it should be evident that this sort of culture would seap into its contents as well.

2. A student-teacher relationship is also a running gag in many manga, anime, visual novels, video games, and films. A good example would be when Naruto was developing his Wind Style Jutsu and Kakashi mentions that he likes Naruto. This, of course, freaks Naruto out even when Kakashi tries to say that he didn't like-like Naruto like that.

The bottom line is, take it what you will. Ozpin's Aura-spirit thing certainly is older than anyone in Remnant, but that doesn't mean that his body is that old (could be early 30's to late 40's is my best guess, but who knows?). And since Ruby is 15 during the Beacon Trilogy, and 2 years older than Japan's age of consent, I have a feeling that Shirow Miwa couldn't help but add that tidbit just for the laughs.

Just don't take it too seriously and you'll be fine... I think...