Spoilers for Persona 4.
[Character Name] Souji Seta
[Canon] Persona 4
[Point Taken from Canon] Post-normal end, before he finds out that Izanami was the one behind it all.
[Age] 17
[Gender] Male
[Sexual Orientation] LOL. Let's go with primarily heterosexual.
[Eye Color] Grey
[Hair Color] Grey
[Height] Around 5'9". About an inch taller than Yosuke, if that helps.
[Other] Um. He has a bowlcut.
[Clothing] Will probably be regularly seen in his
typical school uniform along with
its summer version. He also has a casual summer outfit that involves a white polo shirt and some generic brown pants (it looks like something outta Abercrombie and Fitch and looks horribly metrosexual), and a winter one which is just a black jacket and stuff. Nothing special. Apparently, no one draws fanart of either of them. He enjoys popping his collar, because he's awesome like that. And then there's....
this.
[Background]
BRACE FOR TL;DR AND SPOILERS
Souji Seta first arrived to Yasoinaba after his parents had left to work abroad. It is then that he his introduced to his uncle, Ryotaro Dojima, and his shy-yet-independant daughter, Nanako, as he is to live with them for an entire year. That day, he becomes very sleepy - that is, after shaking hands with the local gas station attendant. That night, he has an odd dream; one that involves being shrowded within the fog. He is encouraged to follow a voice, insisting that it will help him seek the truth. It's impossible to tell where the voice is coming from... but it lends him a sort of power.
The next day, he begins his first day at Yasogami High, where he's quick to make friends with Chie Satonaka and her best friend, Yukiko Amagi, whose family owns the famous Amagi Inn. That afternoon, the body of Mayumi Yamano was discovered hanging from a TV antennae - the cause of death? Unknown. The morning after, he befriends Yosuke Hanamura, after helping him up from crashing his bike into a trashcan - Souji's quick to take notice that he's a bit of an accident-prone guy. Later that day, he's acquainted with Saki Konishi, a third-year and friend of Yosuke's who works with him at the local Junes, despite her family running a nearby liquor store. Apparently, Saki is the one who first discovered Miss Yamano's body, and is taken in for questioning.
That night is the first night that Souji had given the Midnight Channel a try after hearing about it from Chie. Staring into his TV, at midnight, he sees a girl - a girl in a Yasogami uniform who appears to be writhing in pain. What's even more shocking is the part where his hand becomes literally sucked into the TV! ... However, the TV was too small to pull him in entirely, hilariously enough. Yosuke and Chie don't seem to believe his story upon informing them, but they get a taste of the world inside the TV themselves once pushing Souji inside by accident inside a large TV at Junes. Inside is foggy and mysterious - why did the place look like a huge movie studio? All Souji knows is that they need to calm down and find answers. Eventually, they run into a disturbed, bear-like creature, who insists they should leave, creating an exit and pushing them out. It was a bizarre experience, one they all try to forget...
Saki doesn't show up to school the next day. Souji and his friends later find out that she's been murdered, in the same, ruthless way that had taken Miss Yamano. And that's when it hits Yosuke - could the murders of Mayumi Yamano and Saki Konishi be related to the TV World? If that bear was right about people being pushed in, then... maybe? Yosuke is set on investigating, and Souji decides to help, despite Chie's hesitance.
The two head back into the TV World, quickly running into a suspicious Teddie (the bear's name, ironically enough). After a small talk, he leads them into what seems to be a nightmare-ish version of the shopping district, right in front of the liquor store. Was this place Saki's reality? They could worry about that later, because Shadows were approaching, and fast. With Yosuke immediately endangered, that's when Souji hears a voice speaking to him - a voice that grants him the power to summon his Persona, a power that helps him defeat the shadows inside the TV. It's enough to earn Souji Teddie's admiration, along with a little nickname of "Sensei".
The area must be Saki's reality, because suddenly, they hear voices - voices of criticism, hated, and disappointment towards Saki's employment at Junes. And that's when they discover the truth on Saki's feelings towards Yosuke: she hated him all along. Shortly after is when they're immediately acquainted with another Yosuke...? But he's a angrier-looking, and his words matched his looks, expressing all of the repressed, negative feelings inside of Yosuke - that Yosuke came for entertainment value, and nothing else - and of course, Yosuke insists that the Shadow's accusations were untrue. This only prompts the Shadow to taunt further, and his denial eventually sets off the shadow to become a larger, transformed one, and it's up to Souji to defeat it with his Persona.
Once that's over, Souji urges Yosuke to accept the shadow as his true self; that he's still himself, and that it's okay. And he does, although a bit reluctantly, and it's then that he's granted his own Persona. This entire process that he'd gone through was basically repeated quite a few more times - Yukiko Amagi's face was later shown on the Midnight Channel, and they agree to save her before the town gets foggy and she's killed in the same way as Saki and Miss Yamano. Like Yosuke, (and Chie, earlier), she eventually comes to terms with her own Shadow self (a princess in need of saving from her fate at her family's inn) and joins the investigation team that had formed up in hopes of trying to find out just who had been throwing people into the TVs and why. Souji was appointed leader.
The investigation team only grows larger as they seem to be saving more and more victims - next was Kanji Tatsumi, a local delinquent who needed to find his own definition of "manliness". After that was Rise Kujikawa, a famous pop idol who didn't want to hold back who she truly was. After a while, they seem to be fully convinced that the killer is a fish-eyed boy by the name of Mitsuo Kubo - after all, he had successfully performed a murder on their homeroom teacher, Kinshiro Morooka, in the same fashion as Saki's and Miss Yamano's! He hides inside the TV, claiming they can't catch him there, but they... do, anyways. Afterwards, he insists that he's to blame for all of the murders. The investigation team feels certain that all of their problems are over. The killer is caught. It's done.
But there are too many loopholes. Naoto Shirogane, Inaba's local "detective prince", is certain of this. Although onto the investigation teams antics (whatever they were), she was determined to solve this case for herself, stubbornly putting herself on TV so whomever the killer was could find her. As planned, they rescue her, and she joins the team as well - but now they're all at a real loss of who the killer could be. If it wasn't Mitsuo, then who? That's when they begin to suspect Taro Namatame, the man whom Miss Yamano was having an affair with - although having an airtight alibi. Still, it didn't matter at the moment, because Nanako was missing, and Namatame took her. They're quick to head into the TV World to save her, but she's weakened, having to stay in the hospital. They all try to stay by her side.
So then the fog gets bad. And I mean... really, really, bad. It darkens to an ugly shade of green, and the townspeople are becoming sick and hysterical. Upon putting their TV World-exclusive glasses, they realize that the fog is definitely from the other world. It might be enough to get Inaba's residents ill, after all. However, Nanako's frail condition worstens, and she ends up passing away, leaving the entire investigation team in a funk and a sense of utter hopelessness. Why did Nanako have to die when a killer like Namatame lived? It wasn't fair - and the person who took note of this the most was Yosuke, who became angry. Angry enough to insist that Namatame should be pushed into the TV, should suffer as much as he's made all of his victims suffer. And he's totally serious. Souji stops him. There's more to the picture that they aren't aware of yet, he insists, but Yosuke only gets more and more angry. Still, Souji doesn't let down; they're missing something: Namatame's true motive. A good talking down to finally shuts Yosuke up, and after a bit of adding up the facts, they go to question Namatame. They find out that Namatame truly believed that he was, in fact, saving his victims, tossing them into the TVs to keep them from the reaches of the true murderer.
The true murderer. Not Namatame. The mystery isn't over yet.
Nanako was able to come back to life. Girl's a fighter. Everyone is much happier by the news. And then it's back to work. After much discussion and re-evaluation, Souji realizes after a bit of Aiya's steak bowl that the true killer must be his uncle's partner... Tohru Adachi. After all, he fit all of the facts perfectly. They try to confront him back at the hospital, but he escapes through the TV. Jumping in through Namatame's TV would have been reckless, so the team decides to go in through the usual way in Junes the next day after getting some rest. The next day, they do in fact find him - and not just anywhere, but in the room of Miss Yamano's inside the TV World. There, Adachi elaborates a bit on how/why he did it (all while looking and acting completely apeshit), and basically... he did it because he was bored? He hated being forced to live here, in the boonies, surrounded by all of these bitches and whores. So he pushed said bitches and whores into the TV. It's a pretty fucked up reason, the team thinks (and especially the angered Yosuke, who personally knew Saki), because to Adachi? This is all a game. So they decide to pursue Adachi, whose world is a very twisted version of Inaba. Creepy music, caution tape, a black and red sky - the works.
They then find out the truth behind the TV World, who's behind it, the fog, almost everything. Apparently, if humans were okay with playing around in the fog and hiding from the truth, then turning everyone into shadows would be perfectly fine! Only... not. Dojima personally assigns Adachi an ambulance after the whole thing, unable to completely forget the fact that they are partners, even if Adachi was the one behind it all. They celebrate with cake made by the girls (which is surprisingly edible?), and life is pretty much back to normal, but Souji still must leave in three months. Can you tell I'm finally getting lazy writing this history section...
[Personality]
There's not much to say on Souji's personality (literally), but it's pretty much made obvious that he's a kind, benevolent boy. He's quiet, and can be quite blunt, but he knows how to handle any situation with ease, patience, and a sense of calmness. He's intelligent (at the top of his class!), and he's easily able to make friends - he doesn't mind helping anybody out (though, in Ai's case, she seems to run him dry...). Because of this, he's quite popular at his school, with many admirers. Given his role as leader, he takes it seriously, being the one to handle many of the group's decisions. He has yet to disappoint.
[Specialties/Abilities]
LOL. Well, I guess you could say Souji's a bit of a gary-stu in this aspect. It's more like... what can't he do? As far as normal social skills go, he's excellent at cooking, fishing, origami, building gundams model robots, school in general... he's also able to juggle quite a few part-time jobs, such as working out at the local hospital, tutoring grade-school kids, or helping out at the children's daycare. He's a pretty productive guy (and dare I say it? Good with his hands.)
Not-normal-skillwise, Souji is a Persona-user. Although his main Persona is, in fact, Izanagi, he's also granted with the ability to switch up Personas, easily utilizing the strengths and weaknesses of the Shadows that they face. However, Souji won't be using his Persona skills here.
[Affection] Souji's just... pretty much friendly to everyone, I guess. As I mentioned, he'll probably help out anyone who asks, and he's pretty much good bros with all of his male friends. When it comes to girls, he can be a bit of a charming flirt, but only when necessary. He's a pretty popular guy, so dating is nothing new with him.
[Fighting] Souji... doesn't really fight. Again, he kind of only does this thing when necessary, but that's not to say he's not a strong guy. He'll probably need a good reason to have to fight you, but otherwise, he'll pretty much try to calm down anyone who was riled up enough to the point of wanting to fight. (I'll not delve into Magician s-link rank 10.)
[Other Facts] Keep in mind that Souji's a silent protagonist - therefore, he has no distinct canon personality like the rest of his friends. So, his characterists here will be mostly based off of his "nice boy" tendencies and options in the game, along with the manga (sadly, four chapters isn't much to go by at this point). He's also largely defined by his social links and the people around him (since hey, they do most of the talking), so that's another important thing to keep in mind.