Wicked souls? She was literally from Hades then, an actual Hell, a concept that Samus herself wasn't very familiar with considering her estrangement from human culture.

"As far as I'm concerned, at least within my world, the souls of the wicked can only be punished in life. The concept of an afterlife is..... almost incomprehensible there. Though I believe that something like it exists..."

After all, she was forced to face off with the ghosts of her foster race time and time again on Tallon IV, and she knew that the Chozo were aware of extra dimensions.

"I can understand how your sense of morals would be different than mine in that case, however."