Scott proceeds to share as many interesting facts as he has on laws relating to magical beings and beasts. 

They drink their tea. 

In spite of Sadde's ostensive relationship with animals, she seems fascinated by this.

And eventually, Sadde should go home.

Yes, she should.

"Bye, Scott!" she says, and hugs him. "Bye, Mr. MacDougall," she says, and doesn't hug him.

Mr. MacDougall will of course wait with the kids until Sadde's mother arrives, and be quite alright receiving no hugs. 

Scott and Sadde continue to write, about the state of wizarding law (awful), and about which subjects they'll be specializing in, after their initial general overview. 

Summer comes to a close. 

And at the platform 9 3/4, a boy who has just hugged his mother goodbye is pushing his luggage cart along.

Sadde is welcome to hop aboard the train.

Yeah, lacking any familiar faces, he'll do just that.

There's a boy sitting in this compartment already, with an owl in a very clean cage and with a small trunk at his feet. 

He's currently gazing out the window. 

He knocks and opens the door a tad. "Hi, can I come in?"

"Come in."

He turns a smile on the newcomer.

He does. "Other compartments already have people so this seemed as good as any." Owl and luggage find places. "Hi, I'm Sadde."

"Alistair. Is that your owl? This is my family's owl, my parents wouldn't buy me my own." 

"Yeah! His name's Richard."

Hoot!

"I'm a muggleborn so never had an owl."

"...Okay. You probably shouldn't lead with that. Her name is Florence."

"Why shouldn't I?"

"There's a lot of bad blood after how things ended last year. If you stick to people who were on the right side of the war, you should be fine, but it could be dangerous to be too open with the wrong people."

"Oh, don't worry, I have a Plan about that. I'm gonna make all Slytherins like muggles and muggleborns."

"How are you going to do that? Slytherins may be opportunistic, but they aren't going to compromise on something that was part of their house for so long..."

"By being the awesomest muggleborn Slytherin ever, drawing a lot of fire, and creating a conspiracy amongst the younger years."

"That's adorable," says the boy his age.