Oh, good, she picked right.  "How much bigger?"

Ren gestures.

Haru resumes explaining dungeons.

It's so useful that she can get information about the world while attempting to get Haru to like her more!

Eventually he deems that this has been enough talking about dungeons and resumes studying Japanese (this can include teaching her Japanese) while Ren makes them egg sandwiches.

She will happily learn Japanese also.  Can he explain the titles to her, especially?  It's important to understand how to address people.

"I don't understand honorifics that well myself either. The safe polite thing to do is to call everybody their surname and -san, or their entire name and -san if there's like two people named Nakayama in the conversation or something. If somebody were like a god you'd go with -sama but for assuming you don't meet any gods, you don't say -sama to people that unless they are the emperor or you are a customer service person? I think? And then there's -chan and -kun which are like, the ones people use for their friends, or for kids, so I got a -kun just now because I'm a kid but you'd get a -chan in the same kind of situation because you are a girl. I think it's more complicated than that somehow? And not using an honorific at all is also something for with friends. Also there's -sensei for teachers and also... doctors? But I think it's not rude to -san them as long as you obviously have an accent and don't know what you're doing. So the thing I am going to do till I understand it better is just -san everybody all the time even though it's so annoying and people have names for a reason."

"But I should call you Haru-kun?"

He makes a face. "If you are going to live with us I don't think anyone will think you are being weird if you just call me Haru without anything attached."

"Okay, Haru."

"Thank you. - Do you want to have everybody saying 'Kennedy' in a Japanese accent all the time? It's fine if you do but some people just pick a new name to go with a new language."

"Ummmm.  I think I would have to learn more Japanese to know which was a better idea."

"It'd sound like ke-ne-di or ke-n-ne-dy if you wanted to keep the double N, with the e instead of the eh vowels, and they'd maybe stumble on the di part because that's not a very normal sound in Japanese."

"I think the first one sounds fine for now.  If I want to change it later, will I be able to?

"Probably yeah."

She nods.  And they can continue studying until, and perhaps even after, there are sandwiches.

Sandwiches are a studying-friendly food!

Ren's new phone is delivered not long after lunch. She has Japanese to study too once she's got her stuff downloaded from the cloud flashcards and all.

....Oh she's really tired, actually.  Really tired, now that she's eaten again.  "Are there," she does a big yawn, "any pajamas I could use, Swan-san?"

"Haru's got pajama pants but normally just sleeps in the same kind of shirt he wears during the day. Do you want to go do some clothes shopping first or are you too tired?"

"Ummmm.  I want to go to bed right now."  She looks pretty bleary.

"Okay then. We can go get you some clothes with what Takuma-san sent tomorrow, I just didn't want to do it without my phone because I'm sure Haru would rather stay home."

Nod nod nod.

Then Kennedy will attempt to shuffle into bed wearing a scarf and a T-shirt (and boxers).

Ren hurries in after her to dig up a pair of Haru's pajama pants for her in case that is preferable than the scarf-skirt or nothing.