Her sense of direction is nothing special. She disembarks once they have parked.

The store appears to be of approximately the genre containing Walmart, K-Mart, and Target.  It's pretty empty; there are some elderly people walking around and a posse of twenty-somethings who look like they were probably up all night hanging in the snacks section.  She doesn't see any obvious staff yet.

Lucero gets a cart and tells her not to worry about the prices.

"I am getting clothes only or also other things?"

"If there are other things you need I expect that to be fine."

She'll at least start with clothes. Do they have jeans and t-shirts here.

They have pants, some of which are fairly jeanlike although the pocket layout is different and they aren't reliably blue.  It looks like bootcut mid-rises are in style.  T-shirts they pretty straightforwardly have.

Bootcut midrise is fine. If they don't have the "blue jeans go with everything" convention she'll get them in black. Solid t-shirts in a variety of colors. What season is it outside - or - "Am I going to travel with Arillegua?"

"If you want to, I think."

It's been warmish but it's hard to tell whether it's summer proper or just that sort of place.

"To cold places? Hot places?"

"Cold places in a few weeks, places like this until then."

Mostly short sleeves, a couple long sleeves, a cardigan. Their bra sizing is going to be completely unrecognizable, isn't it, she wildly eyeballs stuff and goes to try it on.

It's not that hard to find ones that are approximately comfortable for a minute, but it's hard to say if they'll stay that way in the long term.  She notices an employee-summoning button on her way out of the changing room.

If she ever knew any bra-related words in Spanish they have flown out of her head. She will get things that are comfy for a minute and have nothing obvious that's going to start chafing or stabbing her in the armpit an hour later.

There are chairs for waiting in and Lucero is waiting in one.  "What other things did you maybe want?"

"A - bag for travel. Notebooks and pens. Things for once a month." Which she might easily have forgotten about for another week or two and realized about suddenly on a tour bus, so, uh, thanks, creepy faith healing blood fountain. "Hairbrush."

"...Those sound fine."  He looks slightly confused.

Which of these things will she find first trawling the aisles?

Stationery supplies are over there!  Luggage is not too far thataway, but hygiene stuff is all the way back across the store.

There are some notable omissions in the selection.  (Though there is exactly one kind of toothbrush, should she want one!)

She gets a rollerbag in dark red and puts her chosen clothes and notebooks in it to roll them about. Actual toothbrushes, cool. She will get the exact one kind of toothbrush. Toothpaste?

Yep, if she's good with lemon flavor.

That is a weird choice but she has nothing against lemons.

Even after a while of walking around the hygiene section she still can't find the period products.

"The once a month blood thing? Are there things for it?"

"The... what?"

It's very unfortunate her guide in this matter is a man because now she can't tell if they don't have periods on this planet or if he just, as an individual failing, slept through sex ed. "The once a month woman blood thing. I don't remember the word for it."