When I lived in Japan, about 30 years ago, it seemed to be a trend among young women to stand and walk pigeon-toed. It seems likely that manga took their cue from what was popular.
At one point, it was considered cute/attractive. I don’t know if it still is IRL (I don’t notice it when out and about, but I also don’t pay much attention to anyone’s legs or feet), but it definitely has stuck around in drawn media.
Why are they all pigeon-toed?
When I lived in Japan, about 30 years ago, it seemed to be a trend among young women to stand and walk pigeon-toed. It seems likely that manga took their cue from what was popular.
At one point, it was considered cute/attractive. I don’t know if it still is IRL (I don’t notice it when out and about, but I also don’t pay much attention to anyone’s legs or feet), but it definitely has stuck around in drawn media.