Well, let's just go with them being in the later teens for Phanty and Winnie to 21 for Sibella and Elsa. Cool?
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"So he just ran off?"
Three teens sat in a corner booth of the local diner. Not exactly a secret meeting place, or even that great of a diner (It actually has Nasty in the name, for Pete's sake), but nobody paid attention to these three much anyway.
"It wasn't that he ran off, but he looked scared," Danny said, "really scared, like Box Ghost facing the Ghost King alone scared."
"Weird," Tucker, the techie of the group, sighed.
"Tucker's right," the ever gothic Sam agreed, "Skulker might not be the strongest ghost, but it would take someone really strong to scare him off without a fight. Who was the ghost-girl?"
"I don't know, she just showed up in the middle of the fight, said she was my biggest fan and Skulker bolted when she looked at him. She said her dad got mad at Skulker at the Christmas party. I got away when she got a phone call. She said her name was Fantasia."
"That's Phantasma, dreamboat." a cool voice whispered in his ear. Danny's head shot to the side to see...nothing.
"What is it, dude?"
"She's here," Danny gasped, how had she not set off his ghost-sense? "...Phanty?"
A high pitched giggle came from the air in the seat next to him, "Riiiiiiiight." the ghost teen fading into view , oddly nobody in the joint noticing, "So this is how Danny Phantom spends his off time? I would have never guessed, I mean I've heard rumors you were half ghost, but that didn't seem possible. Of course, silly me, in a wonderfully weird world like ours I should never, ever, ever, ever say something is impossible because that's kinda like begging, no, daring to be proven wrong, Right? Like I once told little Tanis she'd never prank me, and what do you know, I wake up the next day bandage tied to Elsa's shock table, and I still don't know how the little terror did it."
The three living (or mostly so) teens watched her little speel go on in wonder. If she was alive, she'd be dead from lack of oxygen.
"Excuse me," Sam interrupted, already on edge around any Danny fan, "Who are you again?"
"Oh, silly me, I'm Phantasma, but you can call me Phanty, and you must be friends of Danny's."
Danny rubbed the bridge of his nose, he could already tell this would be a headache.