Also, she is going to get a cake.
Alice carries it through the door in an enormous plain white cardboard box, reinforced on the bottom with two extra layers of thicker cardboard. Instead of de-invisibling in the stairs, he sneaks all the way outside to visibly come back inside and take the elevator. Helpful strangers push the buttons for him.
Bella grins when she sees him and the cake box. "I bet this is going to be the best cake of all time," she says.
Bella moves some books that are on her desk onto her bed, then thinks of a better idea. "There's a dorm kitchen. It's not suitable for actually cooking in, but it has a big table and some plates and stuff."
And lo they proceed to the kitchen with Bella's cake, and the candles are set alight with the lighter that Alice either remembered to bring or "remembered to bring", and they acquire six other dorm residents who lurk around attentively.
Bella laughs, and decides to actually do that. She picks the hex-power of variable cognitive speedup that she's been turning over in her head for a while now. "Do you think it'll come true?" she asks Alice in her corniest voice, after blowing out the candles.
"If you wished for delicious cake, then definitely," he says, and looks for a knife to cut the cake with.
There is a selection of terrible knives in the kitchen. A couple of them look like they could successfully go through cake!
Other dorm residents have begun to accumulate (a few initial witnesses went and fetched friends). Bella knows everyone there, and as long as she gets a nice big corner piece and Alice gets a taste too she is perfectly willing to share.
"Which part you want?" he asks, gesturing with the knife to the various available parts of cake anatomy. Corner, edge, middle, lots of candles, no candles...
Others start putting in their own requests with various amounts of timidity.
"I wonder where Janine is," Bella says.
He cuts Bella her desired slice; it takes a little work to get the knife through the chocolatey shell in some places, but he manages it in the end. Then he moves on to the next nearest person, and so on until everyone in the room has been served, at which point he finally hacks himself off a corner.
"This cake," Bella says, "is the chocolatiest and best cake."
"Hi, Janine!" says Bella. "Want some of my birthday cake?"
"Comin' right up," says Alice. Janine gets a piece with a single guttered candle, which she carefully extracts from its chocolatey surroundings before beginning to eat.
"I had it made special," says Alice.
"It is delicious."
"Death by chocolate," remarks Bella, pretending to keel over.