Ooh! That looks like fun! And it's hard to not know the rules of a snowball fight.

Here is someone new, looking about ten or eleven, with winter-appropriate clothes (except for no hood, letting that improbably full and shiny hair flow). With a snowball. "Hark! A new challenger approaches!"

Lucy throws a snowball at her

Susan throws a snowball at Lucy while her back is turned.

Zoe almost dodges the snowball but it hits her arm. She tosses her own snowball at Susan overhand and immediately starts scooping up a new one, grinning. "Taking advantage of distraction. Sneaky!"

(grinning) "Terribly underhanded"

(two snowballs at Susan simultaneously)

Susan successfully dodges these snowballs.

Wheee snowball fight! "Take this!" Fast snowball... Which falls apart in midair. "Oops." She prepares to dodge.

(returning snowball, and glee) "did you just do magic!"

"What uh no! I just threw it too hard." She dodges acrobatically. "Snow is fun isn't it!"

Lucy begins making a bigger snowball.

She'll drop the subject of magic for now.

And Susan takes advantage of her distraction again

The fun snowball fight proceeds! Their new friend makes sure not to cheat very much. But is she dodging a bit too well? And that hair isn't allowing itself to get frayed or snowy at all.

Lucy is also surprisingly agile. Miss Susan Pevensie dodges well too, but not to the point where it would be especially remarkable.

Once she is exhausted, Lucy sits down in the snow and beckons Zoe over. Susan stands by her.

She bounces over, as full of energy as she was at the start. "That was fun! You two are fun!"

"I'm afraid I'll talk about something more serious now." says Lucy, in a more serious manner. "Do you have anyone else to talk to about your magic?"

"Aww, poo. You could tell." She looks very put-out. "I was trying to keep it a secret this time."

They pause to think what to say. Then:

"We're already familiar with magic, we aren't going to think you're weird over it. Or we don't think of weirdness the way most people do. And we won't tell anyone if you don't want us to."

"We ought to tell Edmund and Peter we met someone with magic. But they won't tell anyone else either. Do you know about other worlds?"

"Oh yeah I go to those all the time! It's kind of my job or something. I dunno." She appears a ball of sparkly light in her hands and starts bouncing it off the ground.

"Lucy, Peter, Edmund and I grew up in another world where time passes more quickly than here, then got sent back to this one and put back into childrens' bodies. We got back there later, but by then most of the friends we'd had there were long dead.

I'm Susan and this is my sister Lucy. It's nice to meet you."

"Ooooh yeah time stuff is hard. I'm Zoe! Nice to meet you too! Wait wait you're not actually kids like me?" She kicks the little glowing ball away into the snow, looking serious for once.

"I'm afraid not. If you'd like to meet other kids who know about magic, we could introduce you to our cousin and his friend. They've also been to Narnia, but they were only there for a few months."

"That could be fun! Sure! I don't hafta leave for a while and you two haven't even tried to yell at me yet even though you're adults in disguise."

"They're visiting us for Christmas, and we live three blocks from here on Finchley Road, if you want to meet them now?"

"Yeah! Which way is It? Want a shortcut?"