[ReddyRedWolf]

Spoiler:

Arad knows Messer has Var. Years ago he was a victim of Var and Kaname's song saved him.
Kaname was an idol whose career didn't pan out. She was to be Walkure's manager but she was recruited as she had Fold Receptor Factor.
It is revealed to those who doesn't know what Fold Receptors are. Hayate also has it.

Hayate and Mirage together keep Messer's secret. Unfortunately Bridge Bunnies spread that they are dating which reaches Walkure and Freyja. Freyja is anxious about it that she spies on them. Learning about Messer.

Walkure is testing singing at Ragna's own ruins. It is now already known that the apples and Ruin waters are the cause of Var.

On Windermere Roid isn't much concerned that intel leaked out. Keith and the Aerial Knights raid Ragna.

Their real objective was to get Walkure's effect on Ruins. Bogue again attacks Walkure who is on Macross Elysion but is thwarted.

Keith's real objective is to have his duel with Messer. Messer though is having another Var attack. Walkure singing brings him back.

With their primary objective accomplished the Aerial Knights retreat.