On the floor with the two girls

You walk towards the two girls sitting on the floor, and as you do, the one in back finishes braiding the other girl's hair, and they switch places.

You sit down next to them, and without looking, the one currently in back asks "What's your name?"

"Connor."

"Hello Connor. I'm Skye, and this is River."

"Hi Connor."

"River thinks that your family is magical, but I think that you're a first generation."

You blush furiously at the thought of being taken to be a first gen, when you're part of one of the oldest families in Alexandria. "No, I'm- My family's magical."

"Told you!" River says in a sing song tone, "That's one more for me!"

"Which puts our score at two to three, I know." She sees your expression and explains. "We have a running bet, any time we disagree, whoever's right gets a point."

"Five hundred and eighty six to five hundred and eighty five." River chips in.

"Every time you have a point, you get to spend it by giving the other one an order."

"So you've known each other for a while?" you ask, assuming that they didn't make five hundred bets just today, and issue five hundred commands.

"I should hope so, we're sisters." Skye replies.

"Twins!" River adds.

"Don't we look it?"

They both turn to look at you. To be perfectly honest, they don't look that similar. River has straight black hair, while Skye's hair is blonde and wavy. Both are slender, but while Skye has the larger bust, River has the body of a model. Skye's eyes are blue, and River's are green. But maybe you should say they look alike anyway?