"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..."
"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."