User blog comment:Hielmiez/The New Queen Idol Reveal! Hype for S2!/@comment-30886579-20170126130634/@comment-3487190-20170129002625

>  the S4 Selection result and I don't think Elza know about Yume's mysterious power.

The aura power is kinda a public news already. But also, Hime is an owner of the power and a stronger idol. I only think Elza feels interested only because of her personal taste. Perhaps we don't have to overanalyze it for now.