User blog comment:MiyamaSara/Lily,Yume,Photo-chan/@comment-27168097-20160923060457

Lilie is weak in hot weather (or something like that) is what the PV introduce her said. So Lilie doesn't being sent home or hurt by coughing like you said.

And this is not a fantasy or magical girls series, so there are nothing like Power or Safe or else.

Idol aura are base on an idol's personality, so no one share the same aura.

And I don't get the rest of what you're saying.