I think I can hold you while I ride a horse but if that doesn't work we can get a wagon.

Cozy. Okay.

He can totally hold her while riding a horse.

There is so much prairie. Hundreds of miles of prairie.

"Oh wow."

He nudges the horse to a stop and sets her down.

She hands him Katin and goes dashing off, arms in the air, whooping.

...awwwwwwwwww.

Eventually she is tired and plods back.

"That was adorable."

"Aw, thanks."

"Sorry for frightening you."

"Enh, I'll get over it."

"Oh good. Want to hear some magic music?"

"...you have magic music?"

"We have magic music!"

"I would love to hear some magic music."

He sings up a thunderstorm. Clouds roll in, quickly and steadily, and build into towering cloud formations above their heads; it starts to rain, though not on them.

Whoaaaaaaaa.

He winks at her. It thunders. He keeps singing.

Will this work if I do it?

Yep!

How much are you controlling the details, what bits do you change to do it...

For something like this, a lot, you might want to start with smaller things which vary less and then I'll show you how to add tweaks and things.

Okay! Does - She doesn't know Grey Her's name. - she know how?

She does! She learned in Angband. She's not supposed to sing magical songs we haven't vetted in case they do magic such as 'kill everyone' but she sings ones I know or ones that she's sung to a volunteer who did not subsequently die.