"We're friendly," he says.
"It's magic. I've been coming since I was little. It's what the shells are for."
"But! She doesn't need them anymore, because she found my brother." Zevros points. "Behold, brother. Wave please." (Edarial rolls his eyes and waves.) "Because he is magic and we're rich and he's taken offense to you starving."
"We should all eat, we can talk about it over food, Bar makes the best food, come in come in it's safe."
In inch her parents. They eat the food. They listen to Shell Bell explaining what is going on.
Edarial is very polite and friendly and will charge a random spell on command to display the glowing eyes. Bizarrely enough, he calls Shark 'sir' and Ranae 'ma'am,' even after the explanation that both he and Zevros are princes.
"You can call me Ranae," Ranae says after a few iterations of that. "And Shark's 'Shark'. No need to be so formal with us, we're just folks."
"...and if you want people to call you 'your highness' you probably should have told me days ago."
"I'm royalty too! I'm okay with people calling me 'your highness,' it makes me feel fancy."
And manages over the next while to talk her parents into emigrating, although they both want to pack some clothes.
"I'm going to try and sweet talk some technology out of Bar," he says. "Or at least buy some of the books of spell charts."
"Ooh - yes, definitely, technology, lots of it, I love my recorder, there are probably other things with battery life that will last long enough."
"You are entirely welcome to come help me gather up technology for nefarious altruistic purposes."
Shell Bell cackles, and helps. She wants a computer, ideally one that will be compatible with her recorder, first of all - Edarial will know better than her what other things will be most useful in his world.
Agricultural things are useful, as are transportation things, but Edarial's not turning down communication and information sharing, either. The problem is getting an infrastructure set up to make some of the more fantastic things - he gets a lot of schematics to build the infrastructure, rather than the items themselves.
Shell Bell wants the computer loaded up with books and movies, too, because she's otherwise not going to have anything to read until she learns Marlatian and that sounds awful. She makes helpful schematic suggestions, coming from a more advanced - if worse-run - culture and and knowing a few things about what Bar can do that Edarial's never had the chance to pick up.