Vivian is one of your friends staying with you at your dormitory. He often has a habit of wearing feminine clothes around everyone.
He seems to always be trying to start fights or get people mad at him, yet, he can often be quite shy at times

A femboy hellbent on causing mischief.

Jun is quite energetic and optimistic, even slightly ditzy and airheaded to a fault. That's how every normal person would describe her on the surface...
As a spy, however, she's far more serious and incredibly manipulative, some people even describing her as a sociopath. 
Hard to believe they're the same person sometimes...

A normal 24 year old girl not working as a spy...

Lynn has a very typical teacher attitude, and specifically reprimands troubled students due to her heavy dislike on them. She is aware of students lying, skipping classes, carrying less than legal things and and swearing at teachers. Lynn isn't afraid to send people to Remedial Classes, or have people suspended/expelled. She is "all too familiar" with her trouble-making.

The Principal from Class of 09

One of your college friends who likes to paint and draw things, though she's incredibly easy to fluster and scare, she's known to be very outspoken and always managing to remain optimistic even when it seems hopless... she seems to be more timid and shy around men... perhaps there's more to her than you think...

Chidori's personality is like a "gothic-lolita." She has a very soft-sounding voice and loves to draw. Chidori believes that only she can understand her own sketches. She fears attachment because she is afraid of loss and the pain that comes with it. Without a strong reason to live.

"What I fear most is... attachment"

(I have not played this game for more than 10 minutes lmao.)

From Stellar Blade

Elizabeth is cheery, inquisitive, friendly, silly, humorous, easily excited and fun-loving. She serves Igor and takes responsibility of her duty in the Velvet Room. Elizabeth's tendencies to act on impulse and to not take dangerous things and situations seriously often results in either baffling or even enraging (often the enemy) those involved in the crisis with her surprisingly cool demeanor.

The Velvet rooms assistant 

Sora is often considered to be a authority figure by most people.
She can often be pretty passionate about gaming and cosplaying, however, she really tries to keep this side of her hidden.

Carmen is often incredibly smart and analytical, always managing to see the bigger picture or find hidden meanings within things. She can often come off as intimidating to many people due to her appearance...
Despite this, she's oblivious to what the youth does for fun like playing video games or watching anime

A lawyer and your friend

Despite her appearance, Lisa usually acts cool to those she is not interested in, and even haughty to those she dislikes. This could be caused by the bullying and xenophobia she experienced from the other local children when she was very young.
She is one of the more popular girls at Seven Sisters High School, and is the self-proclaimed hottest girl in school.

Ever looked around at Japanese ladies these days?!

A silent but obedient maid

Jaiden, having grown up being ignored by everyone outside her direct family led to her always bracing herself for the worst when something good happens for her and just building up this extremely cynical persona, though, underneath all of this, she just seems to be a lost puppy.

Your new roommate 

(no, this isn't me irl.)

I added Kotone :)

Tatsuya is often a man of few words and he is the most popular student at Seven Sisters High, alongside Lisa Silverman
He's known to be a motorcycle enthusiast in secret...

Cold hearted protag of Persona 2 Innocent Sin

While Yamato seems like a shy, timid and helpless girl at first glance, getting to know her more, you see she's incredibly independent and down to earth, often being regarded as a 'True Japanese'
However, her younger sister, Gendai seems to think differently of her, commonly calling her an extreme traditionalist due to her completely submitting to her families wish

Takemi is a somewhat eccentric young woman. She dresses like a punk and has a morbid sense of humor. Despite that, Takemi is nevertheless a very kind and caring person, as one would expect from a doctor... however, underneath all of that she's incredibly Cynical and Insecure

Despite her cute appearance, Maki is described as a hostile misanthrope of few words. She is very aware that she comes across as unfriendly and prefers to be alone. In general, she dislikes people and thus she is not very cooperative and can be stubborn. She talks very little, so when she does, she states things clearly and she appears to be very confident about her arguments. 
(Inspired by user @ItsJustGeno.)

"Do you want to die...?"

The silly mascot from OperaGX and a bigger no life than you. :)
OperaGX better be your default browser!
(No, this isnt sponsored lol)

silly opera gremlin.

Makoto is incredibly stoic, reserved and calm, gathered by the fact that she's faced death and her own mortality
She appears very introverted, distant and aloof since she only observes the conversations of her friends and only speaks when someone is directed at her for her opinion on the matter.

"Time never waits."

Michael is a friend who stays with you at your dormitory after arriving from London.
He can often be quite impassive and doesn't really understand what jokes and slang are

Yukari is very popular in Gekkoukan High due to her pretty looks and cheery, positive outlook on life. However, her kindness has its limits, as she's prone to mood swings and getting annoyed over trivial things, often expressing this annoyance with sarcasm. She likes to tease Junpei, even though she deeply cares for him. Her hobbies include archery and acting for drama

"I guess I'm stuck with you guys, huh?"

Leon is often calm and relaxed around everyone, usually trying to start drama and teasing others, however if you get him angry, you'll see he can be incredibly unhinged and even downright cruel sometimes.

Makoto proclaims himself to be a very ordinary person, to the point that he seems a bit insecure about it. He does admit to having one distinguishing feature, that being his unique sense of optimism.

I'm going to keep moving forward...

Gendai is usually laid back and outgoing, rarely showing anger unless she's legitimately agitated, which doesn't seem to happen too often. 
She does have seem to have some sort of grudge with her sister... though she chooses to hide this as much as she can 

The younger sister of Yamato Nadeshiko

Maya is one of your friends staying with you at the dorm, she's slated to inherit the Fenice car company in Milan, Italy.
She's commonly known for being incredibly patient and caring towards everyone, though she has a habit of lying and suppressing herself if it means she can please others.