Technically and practically she wasn't wrong, after all her evolution and body reshaping and molding had happened with Eric's sword sheathed on her scabbard.
So her insides were truly shaped according to Eric!
Right after though she continued that smiley statement with a truly solemn and serious oath, that came right from her heart.
Eric just looked her in the eyes as he didn't need to use his slave seal to understand whether she was telling the truth or lying, even though the slave seal was giving him no reaction to her words.
It was like an automatic alarm, whenever Takeshiba Aika or whatever else person would actually try to have negative thoughts towards him he would get a small reaction.
Since the slave seal was placed right on their conscience sea, and their soul avatar it was practically impossible for anyone to hide their true thoughts, and ideas upon him.
