"Is something the matter, Master?"
Fenriri noticed Albion's eastward gaze, but she failed to discover anything unusual in the eastern direction when she took a look.
"It's nothing serious; just a foolish woman who doesn't understand what it means to be a blood slave—even after receiving an explanation for it," Albion casually replied.
Empress Una thought that she could hide things from Albion's monitoring if she limited her own activities.
But as he explained, he didn't just see her situation; he could even read her thoughts.
To use his blood essence to mark her soul with his will was akin to putting a piece of his soul in her body.
Everything she saw, heard, smelled, and thought was read like a book.
At the Expert-level, he could even exert his will to shake Empress Una's soul, causing her inexplicable pain and torment, or take complete control of her movements like a puppeteer.
Such is what it means to be a blood slave.