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.
YMMV: Stellvia of the Universe
Foe Yay: Yayoi and Ayaka, during the scene after Ayaka tries to kill Yayoi out of jealousy, when Yayoi forgives her. Afterwards, it's just Les Yay.
Les Yay: Shima and Rinna, to name the most obvious case.
What about Shima and Arisa, then?
And let's not forget Ayaka and Yayoi, which somehow manages to stay just subtext.
Moe Moe: Shima is almost an archetype, though most of the girls show some traits of it.
Wangst: Shima keeps beating herself up for not being good enough, even after she actually saves the Earth.