Similar to how Atur's design is based off Ifrit, I designed Setsuko somewhat with the (general) Final Fantasy verson of Shiva in mind. She would have very pale skin, but with a blue tint. She has sky blue hair that she wears in a long single braid, either kept behind her back or pulled around front, which she plays with when she is nervous or irritated. You can probably guess how she wears it when she's interacting with Atur. They don't have to be next to each other, but the opposite ends of their home is about the limit of the distance before problems start to occur at the edge of the "range" of their powers (which would actually be outside the farm, but not in an uninhabited place). She generally wears kimono's whose color palette range from bright white to shades of blue all the way up to navy blue and many of them have snow and ice themed patterns, but they all use an indigo obi. She wears white tobi socks and sandles. Her eyebrows are the same color as her hair, but look more like thick dots than eyebrows (something popular among nobles both male and female in olden days of Japan). Her blushing, as opposed to being red, is blue and only gets darker the more intense her blush. Though she binds her chest, she is still noticeably busty even through her conservative kimono. She is very unimpassioned and tends to look at the world in a very pragmatic way, which tends to come off as cold and detached. Her sense of humor mostly involve making dry sarcastic comments, but only does so when sufficiently annoyed, and they tend to go over Atur's head. She enjoys reading and drinking warm tea, but she is an absolute disaster in anything cooking related, even boiling water, and generally needs someone to make it for her. Her favorite food is plain vanilla ice cream with nothing on it. She is generally very polite and quiet, especially around around new people, but is rather cynical and untrusting in her thought process.
I have to admit I made up probably more than half of this while I was typing this, so thanks for giving the opportunity and motivation to write this out. You can actually find a link to the planning doc I'm talking about in a topic in the "general bs" forum. There are like 29 OC's in it including but not limited to: a nerdy pig girl/orc, a milf kitsune (whose appearance isn't planned out yet), a gothic lolita tsundere loli monoeye, her huge blacksmith cyclops younger half sister, a plant girl who's flirty when naked but incredibly shy and nervous while wearing clothes, a teenager looking devil woman who's older than she appears and constantly behind on what's popular, a pirate shark mermaid who is also a One Piece fan girl, and a matronly "dairy breed" centaur who often tries to get the protagonist to "sample her milk". I haven't worked on the doc in about a month, so I need to update Atur and Setsuko's descriptions. I haven't made individual designs for most of the characters, so for now they look like the images at the bottom of the doc.
