Erich was surprised by Lunaria's reaction to his gift to her. After all, he was expecting the woman to behave sadistically towards her sister. As he knew the woman quite well, better than practically anyone besides herself. Two lifetimes together had given him this level of intimacy with the woman.
But for her to suddenly chastise him as if he were a child, he knew he had done something seriously wrong. He just couldn't fathom what. Because of this, he was quick to ask Lunaria what exactly was wrong with this gift of his.
"I'm sorry, I don't understand. Didn't you want Daelia kneeling and grovelling before you? You now have just that? What did I do wrong?"
Lunaria could see that Erich was genuinely confused by what he had done, and how it had displeased her and thus a sympathetic look appeared in her eyes as she insulted his intelligence in the most endearing way possible.