This card:

Can Verena can use this while she's attacking? The "while a hostile figure adjacent to you is defending" just means she can use it during an ally's attack, right?

Yes, she can use it also while attacking herself in addition to while any friendly figure is attacking, and also when Murne Rin uses False Orders to attack a hostile figure adjacent to Verena.

Okay, makes sense. Thanks for the confirmation!

(Of course only if she can pay the costs of strain and exhausting.)