User blog comment:FanaticAnime/Idol Auras/@comment-29742182-20160901021552

I personally find Yume's regular aura in ep. 16 the prettiest because of its simplicity. The colors are lovely and the aura itself doesn't get in the way of her performance.

edit. Honestly, I'm not quite fond with the arched auras. Not to say I hate them though. They could've done better, I guess. Although I've said before that I like Yozora's aura the best, it's still way easier for me to concentrate on the performance when it's Hime because her aura doesn't spin around and block the view.