Erika knows the route to school pretty well. She walks it every day, after all. She could do it almost in her sleep, which means it's a good opportunity to get lost in her own thoughts for a while. Something new and unexpected she needs to pay attention to almost never shows up.
Mizuno Ami from Class 5 seems to have beaten her there. (Not stopping for a snack helped.) She isn't at her usual place at an open table, books spread around her. though – instead, she's sitting at one of the computers, squinting at something before blinking and shaking her head.
Wonder what she's working on that she needs a computer for. They're not really friends such that Erika will go ask what she's doing (they may in fact never have exchanged more than six words directly), so Erika will collect her materials for the day and retreat to her usual table.
Ami does the 'blink and shake her head' thing a few more times, before leaning back and groaning with her hands over her eyes. "This thing's giving me a headache," she mutters, only audible because of how quiet the library is, before reaching down to remove a floppy disk from the tower, then turning the whole computer off.
It waits until she's home. Once there's four walls and a closed door between them and anyone else, it jumps and does an odd backflip – and the air shimmers, and a jeweled brooch falls to the ground. The brooch has a large central disk with an engraving of a crescent moon and a series of smaller circles, with four circular gems coming off the disk – red, green, yellow, and blue.
"No, wait, hold on. What did you mean, turn into? Will I be able to turn back? What's Sailor Moon, is that like that- 'Sailor V' on the news?" Also you're a talking cat. Something magic is clearly going on, but Erika wants just a little bit more information before jumping in with both feet.
"You will be able to turn back. You can only access your powers while using a powered item – the transformation brooch will let you access the basics. Sailor Moon is one of the Guardians of Justice, chosen to defend the Moon and everything the Moon is part of – the Earth's orbit, the Solar System, even the galaxy."
"You should be able to hear – perhaps even see – any developing situations you're needed in. Your tiara also has several powers, especially offensive and healing-oriented. They will need practice to use effectively or at scale. You should also be far more athletic than an ordinary human."
"For now. Ultimately, it's the weakest of your directly offensive options. You aren't ready for the stronger attacks, not yet."
"You'll likely be best served using your athleticism to maneuver your opponents to where you can kill them with this, or to restrain any you don't want to kill. Against stronger opponents... You'll need to get clever, or you'll need to retreat."
The sense of emotional drain and brain fog fades a little, slowly, but she's still unaccountably sleepy.
(She is very agile and strong – nothing insane, she won't be throwing tanks anytime soon, but she can move quickly, and she can execute the kind of acrobatics that are just on the edge of human plausibility. Landing from a jump never seems to hurt if she lands on her feet, and even if she falls more awkwardly – accidentally or on purpose – any physical pains fade quickly. Her muscles don't seem to get tired at all.)
School isn't too hard, fortunately – and she's not the only one distracted, at least, so the teacher's wrath mostly avoids her. (There's a lot of chatter about a high end cram school that opened a local site only a year ago, and has started offering more scholarships and promotions lately... And a lot of students seem half asleep.)
"Girls around your age – all of the inner Guardians should have been born the same year as you. They'd all be born under a star sign ruled by their respective planet. They'll likely be exceptional somehow... Strong spiritual power, or physical strength, or intelligence, or force of will... I can sense someone's power levels if I focus on them, but that isn't a guarantee."
"Energy – a lot of it. It feels odd, though, differently so from you or Chiba-san, and it... I shouldn't be sble to sense it this easily."
"There's a lot of strange energy here in general, too. More than yesterday. Something's wrong." (If Erika focuses – really pays attention – she can feel it, too, though even just paying attention to the aura of stress and anxiety makes those feelings want to creep into her own mind.)
No one leaves suspiciously, at least not right away – in fact, suspiciously no one leaves. Usually, people would slowly peel off over the afternoon, or at least drift to other parts of the library. The students at the computers seem pretty glued to them, except Ami who's only a little stuck, and who continues her odd cycle of staring at the computer and then either shaking her head or rubbing her temples.
Okay, that is kind of weird. She could sit here and just wait but that doesn't actually seem very 'Guardian of Justice'-y. That's the sort of person who would take a proactive approach. Maybe that can be her now.
Erika doesn't know most of them but she has at least half an excuse to speak to Mizuno. She will walk up and clear her throat a little awkwardly.
"Hey."
"I need to be the best..." Her gaze starts drifting towards the screen again. (And, even as socially isolated as Erika is, Erika's heard the rumors – the idea that Ami's IQ is over 300 is probably silly, but every time rankings are posted, Ami has perfect marks, scoring at the top of not just her school but of their grade across all of Japan.)
(She no slouch herself academically, but she will freely admit she has no desire to put in the work to reach those kind of heights.)
"I've heard it's not good to spend too much time looking at a computer screen. Maybe you need a short break, if you're getting headaches?"
Her gaze snaps away from the screen again. "I've always preferred books," she admits, "I think computer programs honestly put too much distance between you and the material..." She pushes back from the computer, reaches out towards the tower, "But the cram school's been insisting on this new pro...gram..."
"Perhaps... Or, maybe..." Luna frowns, then jumps in the same odd way as when it gave Erika her transformation brooch. A pink pen with a silver crescent moon on its cap falls to the ground. "You should be able to use this to disguise yourself. Say 'Moon Power, Change me' – and then say what you want to be. If you look like someone who has a reason to be here, the guard won't question you."
"It won't give you knowledge you don't already have, though it'll make certain things easier to remember if they're needed for the role, and it can give you physical abilities and basic muscle memory – up to a point. If you try to transform into a form incompatible with your self-image, it'll work, but you'll feel a heightened distress and struggle with your other powers. Non-specific transformations like 'a student' and transforming into specific people should both work, so long as you can more or less visualize what you want – an animal transformation might work, but I wouldn't suggest trying that now."
"Particularly perceptive or spiritually powerful people will see through it, or at least recognize that you aren't who you claim to be. If you transform into a specific person, anyone who knows that person well will likely notice something's off. Most people won't question your identity if you're where they'd expect that identity to be or if you act as you should, but straying outside of that will strain the transformation."