In the process of revising bits of this thing to make it more presentable. The initial app kind of sucks and falls short in places, but here you go for now.
Background.
The year is 2011 in the small town of Inaba, a rural, country place in Japan where nothing ever really happens. Due to his family's working matters, Souji Seta (or rather, the nameless silent protagonist, but for the sake of the app I'll be calling him by his given manga name) is sent there for a year to stay with his uncle Ryotaro Dojima and his little cousin, Nanako. However, he doesn't have time to fully settle in before strange things start to happen in the otherwise peaceful town.
Almost immediately after he moves in, a woman known across TV networks-- Mayumi Yamano, made infamous thanks to an affair with a politician-- was murdered in the town, her corpse found entangled in a TV antenna. This was huge news, but life went on as usual. Souji, having met some new friends at his equally new school, learns of a strange rumor going around of something called the Midnight Channel. Word said if you looked into your television on a rainy night at midnight, your soulmate would appear on the screen. At Chie's demand, Souji decides to give the rumor a spin; strangely enough, the image of Saki Konishi-- a high school student and friend of Yousuke's-- appears, and then afterwards sticks his hand into the screen and... almost gets sucked in.
Not long after, Saki too was found dead in much of the same fashion Mayumi was. Through a series of crazy events, Souji, Yousuke, and Chie learn of the alternate world that lies behind the TV screens, and then discover they have a lot more to do with the initial murders than they realized. This bizarre place not only alters around a person's inner thoughts and fears, but is infested with Shadows, which are basically monsters; once the fog that plagues that world seeps into ours, the Shadows become agitated and angry, consequently killing the human being still lingering inside. Our group of kids, now gifted with the power of Persona once they face the darker side of themselves, set out to find who exactly is kidnapping and tossing a series of people into the TV world and trying to keep them in there long enough to get them killed.
So, on to Naoto: the Shirogane family had been detectives for generations, making her no different. Thanks to her grandfather's connections with the police (who she stays with in Inaba, as both her parents are deceased), over time Naoto was able to slip her way into investigations and eventually get to a point where she became well known for her deductive ability, thus gaining the title the "Detective Prince" by the public. This time, she volunteered her abilities to the police of Inaba to find out who murdered both Mayumi and Saki, as well as who was behind the mysterious kidnappings.
The first glimpse we see of her is as early as May in the shopping district's textile shop, talking with the owner, but she leaves almost immediately. Once back outside, she's seen talking to the owner's son planning to meet up the next day. So they do, but nothing particularly important happens.
Naoto's next appearance isn't until a couple of months later, seen coming out of the shopping district's tofu shop, where the famous idol Rise Kujikawa recently got kidnapped and was rescued. Another since then another murder has happened, and Naoto notes it's inconsistent with the first two, and implies she might know something about the TVs. Afterwards, she leaves. The next day she shows up at Junes' food court where everyone else is and informs them that a suspect had already been arrested for the murders, and that they have no reason to get involved any further. Her wording sets them off a bit, and then they learn that she'd been kicked off the investigation team now that they made an arrest. Once she's done explaining, she goes again.
A couple of months later after, Naoto shows up at the school gates, this time wearing their uniform; it turns out that she's attending the school now, both due to "family related issues" and that she's not entirely convinced that the outcome of the murder cases is the right one.
About a week later during a school trip, she does hang out with them at a nightclub, and during a game they play Naoto reveals a little about her family history. In return, she wants them to reveal their involvement with the murder cases; she gets some of the truth, but in the end she thinks they're just mocking her.
Few days later, the group runs into Naoto again on their way to school, but she doesn't have any intentions of heading to school that day; instead, she plans on investigating the murders once more and asks them to validate her theories. The inconsistencies bother her, and she thinks that they are the only ones with the means to find the true culprit. Once done, she wanders off.
That night, Naoto appears to have shown up on the Midnight Channel, but the image was too blurry to say for sure, so everyone meets up together the next day to talk about it. The next time they're able to check the Midnight Channel, a much clearer picture of Naoto shows up, and the day after that they enter the TV world to go look for her. Once they're able to locate her, they enter the dungeon she's trapped in; everyone notes the place looks rather childish, like something out of a kid's television program. So they get towards the bottom and find Naoto already with her Shadow self. As the procedure goes, her Shadow self goes on to taunt about the hidden side to her that she hides from the world; she really was just some lonely kid who won't ever become like the detectives she idolizes, angry that society so easily uses and disposes of her, that she'll never quite get the respect she wants. The Shadow self keeps insisting she'll end up crying about it later, but Naoto adamantly denies this. It's also here that it's revealed that Naoto isn't a male like everyone assumed, which came as a shock to everyone. So Naoto keeps refusing that her Shadow self is in fact her hidden, darker side, so it evolves into something bigger that everyone else has to fight. Once defeated, Naoto comes to realize what had been said wasn't untrue-- it truly was a side to her she was trying to suppress. Now knowing what she must strive for isn't her ideal image of a detective, but instead, she must eventually and gradually come to terms with who she is. That done, her Shadow self manifests into her Persona and is thus granted with its power. They're finally able to take an exhausted Naoto out of the TV world and back home.
Once recovered, Naoto returns back to school. At the end of the day at the food court, Naoto relays what she's able to remember about her own kidnapping, and along the way are able to solve a few more things about the case. She then decides to help out and join the team.
Afterwards there's plenty of free time for the rest of the month, as well as other small plotty things, but nothing ~*huge and important*~ for Naoto alone (although there is a plot thing here and there for the entire group). She's pulled from the night of November 2nd, a few days before the next huge plot thing.
Personality.
Different groups give varying perspectives on Naoto-- classmates and people around town look at her as an amazing deductive sleuth with the exact demeanor that one would need for it: calm, cool, and collected, and she desperately tries to keep up that image despite what she's feeling inside. She actually has impressive levels of composure, where even when something does frighten her, she can still seemingly deal with a problem that doesn't phase her. Her speech is very proper and very rarely casual, even dipping into fancy words frequently; it's entirely possible Naoto frequently uses "big words" in order to make her seem more like an adult, rather than things you'd actually catch her saying. Call it overcompensation, if you will. Although she can come across as rather forward sometimes (once she outright admitted having no interest in a pair of girls who sparked a friendly liking in her), it isn't because she's not friendly; Naoto claims she never was any good at making friends, and as a result spent most of her childhood without any. In social situations she's not very talkative, and often doesn't take to teasing too well or isn't sure how to react to it.
The police, on the other hand, seem to view Naoto as-- while a prodigy-- a childish, cocky brat with obsessive tendencies, making them more than willing to toss her aside once they had what they needed. This frustrates her more than anything, and is also the root of her self-conscious problems. She desperately wants to grow up and become an adult so she can finally gain the respect she desires from those she must work with, but above all else wishes she were born male due to the male-dominated work force she wants to get into. She firmly believes if she had these two things, then everything she wants will come to her much easier. Unfortunately, the latter of the two is something she knows she'll never be able to get, and as a result is extremely gender-conscious regarding herself. Naoto becomes extremely embarrassed when classmates begin to find out she is, in fact, female, and completely loses her composure when she's put into a situation where she acts to act feminine in the least; wearing girls' clothing in front of people flusters her, and she absolutely refuses to wear anything very revealing. However, by this point she's come to terms and accepted that no matter what she does, she'll always be female; while she doesn't hide her gender anymore, she's still not entirely comfortable with getting in touch with her feminine side, and still dresses like a boy. As for the former, well, despite being fully aware of her age and what it means, Naoto will not take too kindly to being called a child. Again, she hates that others will hold her back because of it, and as a result makes it up by other means.
Naoto's detective work is a big deal to her, and she strives to stop at nothing in order to solve whatever mystery falls on her lap. This does make her a little obsessive about what she does, in part due to the pride she tries to hold of her namesake, and the other is a genuine attempt to help society. Because of this, she did end up falling back on rather desperate measures in order to figure out the complicated puzzle behind the murders and kidnapping around Inaba; after this, the other main characters had to wonder what on earth drove her to do that. Predictably enough, Naoto is very analytical about everything and will attempt to apply logic to anything possible. She's very perceptive about what people say and do, and on top of that has a good memory about the same thing, being able to draw back on the little details that anyone else would have overlooked.
Appearance.
Naoto keeps a very boyish appearance, to the point where everyone around her assumes he is a boy and refers to her as such. Her attire is entirely made up of men's clothing, and her dark navy blue hair is kept very short. She's also pretty short as well, standing at barely under five feet, and is thin and slender looking; most of the time she uses clothes to try to hide her physique (like a hat to hide her eyes, platformed shoes to make her taller, and binds her chest), although a certain scene reveals that she has a much more feminine figure than she's willing to admit.
Of course, in Damnedland, Naoto doesn't have all these things to keep her true appearance hidden, so it will be far more obvious to tell that she's a girl (unless ... you want to be that oblivious, then by all means, she won't complain). Needless to say, she won't be entirely happy about this, but ...
Powers.
Being one of the main characters, Naoto is of course a Persona user. A Persona is like an extension of one's inner self, a physical manifestation of one's psyche, that can be used and perform certain abilities depending on the type of Persona you have. Naoto's is
Sukuna-Hikona (and unlike just about every Persona ever, the thing is quite tiny and only about a foot tall), its defining skills being Hamaon, Mudoon, and Megidola, although it also has some physical based attacks as well. Hama and Mudo are light and dark (respectively) elements, and when they do work (which, surprisingly, is most of the time-- take that, P3ers!), are instant kill attacks. Megido skills can only really be described as concentrated 'pure' magic or energy, something along those lines-- a specific element is never given because Atlus hates giving us details. Either way, this is not an instant kill attack, however it does manage to bypass any strengths in order to damage.
Unlike the P3 kids, this time users do not need any sort of device in order to summon. They call forth their respective tarot card and "break" it, and immediately afterwards their Persona appears and does whatever the user wills.
Okay time for visual aids!! I like being helpful in the most convenient way possible okay. Anyway I have to give you two separate ones because Youtube fails at life when it comes to giving me precisely what I'm looking for, sigh. So in
Example #1, this is just to show you exactly how tiny Sukuna-Hikona is. You can't even see it in the video most of the time save for the few seconds it actually sits still :| But hopefully you can tell by that! And then we have
Example #2, because by then Naoto's Persona has evolved into Yamato-Takeru, who is considerably bigger than its initial form, but at least you'll get to see what Megidola looks like. Unfortunately neither one of these videos show Mudoon (which would be silly to use in a boss battle anyway), and I can't find any that do, but... Well, it looks like a swirl of purpley doom, if that helps any. If it doesn't, then at least you get to hear some of her hilariously cheesy battle phrases.
Limitations.
For the roster of spells she'll be keeping, it will be Mudo and Megido (the most basic level of the skills she has), and cut out Hama entirely.
Mudo will work as such: instead of instantly killing an enemy, it will be changed so that it only knock out the target for one posting round, if the skill works. The chances if it working at all will be reduced to 1 out of 6 (in terms of dice rolling), and the success of it working can be decided by a randomizer between the other player and I. If used against another RPG-like character or pretty much anyone who has some sort of elemental strength against 'dark', then the skill will not work at all.
Megido's power will be severely dampened and can no longer bypass physical/magical strengths, so if something is inherently strong against magic in any way, then the skill will have to abide by that. The power behind it, at best, would be something like a mini propane tank exploding, just without all the fire that comes with those.
Mudo would only work twice a night, and Megido once. Or if there's a combination, only once each; every time a skill is used, it will cause severe physical exhaustion until it becomes too straining to use anymore (which wouldn't take much, but. y'know).