This still is clearly from after the mansion attack since Pepper is wearing the same outfit she was in during the attack and is doing her "Alas, poor Yorrick!" impression with that damaged helmet. What this means as far as a female being in armor during the attack isn't clear, but Pepper apparently wasn't dragged into the ocean and drowned.
Originally Posted by Gold Samurai
I'm wondering where this scene takes place then.
It's Christmas but the mansion is destroyed
It was sunny in the mansion attack scene from the trailer.