Something is on my mind: either picrel is little bit too advanced compared to other robots in teyvat or she just simply have dozens of human modules installed on her head.
I mean she can drink tea, she can taste a tea, she have emotions, she can be lonely, she can blush, she can make jokes, she can laugh, she can get mad at something, and she can even be a tsundere -- on top of that, she even have her own free will, capable of going to wherever place that she wants and she can function on her own for 400 years straight even after her creator is long dead and gone. For comparison, average meka in fontaine (that are made by the same person) cant even go outside of that nation due to their body being attached to pneumosia energy that powered them up 24/7, something like emotions or free will is definitely out of question to those clankers. But this one, for some reason, can do what those other robots cannot do.
Not trying to say that she's not a robot or leading into that argument, I mean if that wind up key on her back didnt give a clue about what kind of thing she is, she also said something about emotion module several times during a conversation with other people. But I just wondering out of my curiosity about what kind of robot she is. She is a robot, but how did she even be that advanced as a robot? For comparison we have ineffa whose core came from your usual natlan ancient dragon technology that was rumoured to be the most advanced civilization in teyvat yadda yadda, and ineffa is still very robotic compared to her and still relies on ayyno for her daily maintenance and feature installation. Picrel is very human-like and less robot compared to ineffa, she can even made her own robot and several other robots that are 'human' like katheryne and that one guy in ineffa sq.
there's a columbina dialogue where she asked picrel about why she drink a tea instead of machine oil, so I'm not the only person who noticed this thing and try to address something unimportant.