When Nea says she wants Lucien's wives to prove his power through their strengths, they feel conflicting emotions. While all of them, including Daisy, want to do that and help him, they also fear failing and disappointing him.
Even though his draconic aura and Pride's influence make them even more confident of the power he gave them, except for Helena and Daisy, his other wives are still in the Earth Realm, and it wouldn't be easy for them to beat Immortal Realm Mermaids nearby from the sea.
And as the girls think about it, Lucien questions Nea. "So you want my wives to fight? How many of them? Against whom?"
Nea can see excitement and confidence in the eyes of Lucien's wives, even those in the Earth Realm, which makes her wonder if they are as incredible as Claire or just stupidly arrogant people.
She definitely doesn't want to make it easy for demons to deceive her people, so Nea thinks of a pretty tough situation for Lucien's wives.