It’s called a heart [Tamamo]
[Working on a small restaurant had its perks. One of them being that he could offer a more personalized service to the clients that dropped by and since the place was small, he was asked to go out to reel customers in since this also made it easier to ask and find out what they wanted to see more in the restaurant so it could offer things that people could come back to eat more often.
If anything, cooking was the one thing that the white-haired man prided himself best at so this job was fit for him and it managed to keep his mind off of other thoughts that usually plagued him about this current lifestyle. Archer was focused on his task at hand so he wasn’t actively looking for Servants at the moment so it could be said he had dropped his guard for now and as such, he approached a lady that was passing by the street.]
Hello miss, could I offer you something to eat at our restaurant?
[It was only after he had addressed her that he realized that the lady in front of him was also a Servant so his expression froze and felt his body become tense. Was this a hostile Servant? If not then he could probably go about his job without a hindrance but even if he hoped for the best, he prepared his body to defend himself if he needed to.]