"Alt," corrects Shell Bell. "One of us has a twin, but she doesn't look like us!"
"I can see why Kanim had trouble explaining you. You should explain you instead," Tony announces.
"Besides this one who doesn't have a nickname yet, there are a dozen of us!" says Shell Bell. "We're each from a different world. I'm Shell Bell and my world is called Atlantis. One of your daughters found a door into an interworld hub called Milliways and met my girlfriend there. When Bells meet each other Bells we swap magic powers and acquire very long to-do lists."
"Technically, yes, but I'm still getting the safety lectures and so on," says Bella. "As for a nickname, I don't know, how about 'Glass'?"
"Yeah, when 'Tony' and 'Sherlock' don't cut it, I'm Screwdriver and she's Pearl," says Tony.
"You're a me? Wow, you're totally a me," says Tony. "Um... what if I can't think of a good nickname?"
"None of them could," says Shell Bell dryly. "They wound up deriving ideas based on their coin colors."
"Ooh."
Shell Bell makes a square of her own, shows it off, and spends it to produce illusion coins in the princesses' colors.
"...Red-hot iron, apparently," says Tony. She peers at Sherlock, and laughs. "And you're steel. Is there a Steel?"
"Any ideas on how to turn yours into a nickname?" Shell Bell asks Princess Tony.
"I guess you could go by 'Princess' for now? It's not perfect, you wouldn't be the only princess at a Bell party, but I think it wouldn't be that hard to keep your family and Elspeth straight, and if you can't think of anything else..."
"I've got to have more identifying characteristics than that," she says.
"You totally don't, there's a reason the rest of us named ourselves after coin colours."
"So you're all blacksmith fire-witches who make flying armor?" says Glass skeptically. "Granted I don't know how to turn any of that into a nickname..."
"Blacksmiths not so much - more engineers - low-tech here? - and what is a fire witch - and yes on the flying armor, Iron Man did that."