That kind of thing where a line of maids stands by your side for no reason, apart from aristocrats showing off, is mostly liked by the nouveau riche.
In the traditions of the Victor Empire, maids must be able to accomplish everything silently and efficiently to be considered excellent.
However, compared to the maids at the Lord's mansion, Kallen is more concerned about those Steam Knights guarding key positions like statues.
Due to her occupational habit as a phantom thief, even when strolling casually down the corridor, Kallen habitually observes if there are any flaws in the mansion's defenses and where she would enter if she wanted to invade.
However, the defenses of Perfikot's mansion seem deliberately targeted, and Kallen can hardly find any design flaws. Even if she could enter with her Extraordinary skills, she'd be discovered by those Steam Knights with their nearly seamless arrangement.