These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Madoka is a very androgynous woman, and Yukihime hangs out around her all the time. Not to mention that Madoka was the only thing between Yukihime and some poor bastard getting knifed, and we never see them apart from each other.