She finds that mildly irritating for a whole different set of reasons, but it's such an improvement over the alternative that she lets it be. She's very careful not to seem as though she's taking advantage of her new-found position. She demands nothing, and makes only a few careful, diffident suggestions. This will not last forever; no need to burn bridges.
And of course, whenever she receives an email from the Slayer, she responds promptly.
Alli actually gets up early- for once- the next day, but fails to find anything else plausibly helpful. Once she gets to school, she goes looking for the Swans to report her (lack of) news.
Soph is hiding Compendium of the Partially Substantial inside her algebra book. When she spots Alli, she shows her a page titled Binding a Ghostly Spirit to a Talisman to Connect & Entwine their Fates be it Destruction or Removal. "Found something," she says. "I can't get into prom, though, I'm a sophomore, can you do it?"
Alli looks over the spell. "I'm not great at crystal spells," she says doubtfully. "That's your thing."
"Well, it doesn't have to be a crystal per se, I was thinking I'd use a rhinestone that came off a bracelet I have. Easy to smash when it's time to kill the ghost. You could put it in - something else."
"I guess not. I'm still kind of shit at the whole 'chanting circle full of herbs' crap, though. Ugh. Can I just stick you in my pocket and have you do it?"
"I'm not gonna fit in your pocket. I guess I could try to sneak in with Bella, but if someone catches her, she's a junior with a ticket. I can't buy a ticket and if Bella gives me one they'll want to know who my upperclassman date is."
"...I am an upperclassman. And even with a ticket I hadn't actually bothered to find a date yet. So! Want a date?" She pauses. "Witch-date. Actual-dates are for boys, sorry."
"Ha! Sure, why not. Witch-date. I go in with you and I rhinestone the ghost while you and Bella try to keep it from strangling anybody in the meantime."
"Witch-date it is!" She grins. "As long as I don't have to wear a suit. Not my style."
"I don't care. Do you want to even bother coordinating or should I just turn up in something prom-y? Bella's thinking slacks and a blouse so she can move around to fight the ghost if she winds up having to but I can chant in a frilly dress."
"Meh. If you tell me what color you're wearing I might magic up flowers? Other than that, knock yourself out." She looks down at her outfit speakingly. She's in her normal attire: black, black, and more black, complete with eyeliner and combat boots. "D'you care what I'm in? I mean, I'll probably dress up pretty just for the hell of it, but besides that. Gotta say, though. Frills are all yours."
"I'm thinking - red and blue? It'll depend on what I find in the store though. You can wear whatever you want as long as it doesn't get us turned away at the door, not like it's a proper date or anything."
"People will still see us," Alli points out. "We go to school with them, we're telling them we're dates. I don't actually give two shits what they think, but I am me and you are you."
"Yeah, but like - if it were a real date I'd want it to be a whole experience? Complete with attention to outfits. It's not, so I don't care. If people get on my case about what my prom date was wearing I'll just, I dunno, say I wanted to go and you were an upperclassman and that was all. I mean that's even true, just leaves out the part with the ghost."
"Not giving a shit it is, then! Best way."
It's about a week before prom when Bella phones Emma.
"Hi, Emma, it's Bella. No emergency, just a question. Is this a good time?"
"No, I can talk, what's up?"
"I am planning to get into a fight with the Phantom of the Promenade a week from Saturday. There is a plan, but if the plan does not go perfectly, someone may find themselves strangled and/or drowned, and I don't know if prom chaperones are required to know CPR. Any chance you could sort of loiter nearby in case?"
Emma takes a second to process this, then asks, "...Phantom of the Promenade? I suppose I don't see why not, as long as it's not on a work night."
"Week from Saturday," repeats Bella. "It's almost certainly a ghost, which haunts prom."
"Of course there is. Silly me. Week from Saturday, sure, that's fine."
"Cool. Prom starts at eight, I may try to sneak in before then but am pretty unlikely to get strangled or drowned before prom actually starts. Witches will appear on time."