I saw that, I’m just ignoring it because it’s ridiculous. Ayano’s supposed to be strong enough to murder people and drag bodies around at the start of the game- someone who’s a bmi of 15.8 is going to be too weak. Ayano should be at least about 120 pounds. I don’t know Osana’s height, so I chose a weight that’d be okay for someone anywhere from 5’ to 5'8ish.
I’m gonna chalk it up to YanDev likely being very ignorant about weight, which is completely possible given how common it is to not know anything about weight- especially for people a different height than you. (But istg I’m gonna shriek if Budo’s page says “HE’S 500 POUNDS OF SOLID MUSCLE” because that’s just……. not realistic either….)