"I expect if you had the keys to everyone's vaults they would think that was suspicious and at some point assume you'd stolen the keys, but you could probably do some vault-robbing. Ten thousands Galleons really should cover most things you'd want, though."

"Oh, I wasn't going to actually do it."

"I trust you. Yes, you could rather grandly mess up the whole world."

Giggle.

There ensues a minecart ride! Whee!

Past a dragon, even!

"Holy shit was that a dragon I want to go meet the dragon."

"They're danger- uh, they're dangerous to us. After we go shopping we could go visit a reserve in Ireland or something, maybe."

"Okay!"

And his vault! It has substantially less than ten thousand Galleons but enough for most things she might see in a shop window. 

"Okay, now we can go shopping."

Shopping!!!!! It's just like on TV but everything is magic!!!!!

He finds it adorable how entertained she is. They get a trunk to carry everything in.

It's even better than the bag from Timothy!

She wants a lot of things.

Yeah, well, he has all the music and can get his money back later when they drop a ridiculous amount of gold on the Thames. She can have a lot of things.

A+ summoner behavior. She is a pleased demon and kisses him every second or third time she bags a purchase and asks lots of questions.

Some of which have passersby staring, but he answers as thoroughly as he can anyway.

Good.

Eventually she has been in every shop in Diagon Alley and bought half the magic things and taken notes on all the nonmagic things just in time to go make some gold. "I can make it look like I'm getting it out of one of those magic bags."

"That's probably better than no explanation whatsoever."

So she goes and draws lots of bars of gold out of a bag and the goblin expert checks it over and is deeply suspicious but can detect no flaw and provides them with a sack of coins.

And they are sooooo rich. "If there's anything you didn't buy because we couldn't afford it I probably can't sneak out again tomorrow but you totally can."

"I don't know till I try 'em if I want more of any of the potions... can't use a broom... I'm good for now."

"Okay." And back to Hogsmeade.

Secret passage!!!

He's not supposed to be in the hallways at this hour! He rounds a corner and comes face to face with -

"There's a curfew. Because of the Azkaban breakout. I appreciate that you didn't mind helping me enforce it, my nerves've been jumpy all day. We have another three hours on duty and then it's Belmonia's."

"I was just planning to go back to Milliways."