I'll discuss Reagan's relationship with your characters personally but if you have any ideas, I will gladly consider them.

Name: Miles Tucker
Age(16-18):17
Sexual Orientation: Bisexual
Character Traits (combination of positive and negative): hard working, aggressive, irrational, Sly
Biography: Miles grew up in a poor family due to his dad’s alcoholism and his mom dying when he was very young. As he grew up his dad got worse and worse and soon ended up in jail for theft. Miles having nowhere else to go moved in with his grandpa on his mother’s side who was filthy rich. Miles took advantage of his grandpa and started selling his medicine and other drugs to make his own money. When Miles got to Woodside School he made sure to let his name be known getting into fights and making people he didn’t like lives a living hell. As he continued to live his life he only got worse and worse from there getting in fights and selling with more serious people.
Face Claim: Cameron Monaghan

Are you interested in playing the killer?: Sure!

Name: Maxine “Max” Blake
Age(16-18): 17
Sexual Orientation: Closeted Lesbian
Character Traits (combination of positive and negative): Passionate, Level-Headed, Firm, Clamorous, & Detached. 
Biography: The Blake family is notorious for its lawsuits and presumed drug dealings but also running Blake Industries which brings in a fathomable amount of income. Despite her incredible wealth, Max has never been popular. Never. She’s always been the punching bag for he bullies, severely picked on but since her parents are hardly home, she’s just kept her problems to herself, bottling it up. But there’s another fight within in her and that she has a strong attraction to females. Her family likes to believe they are Christian and obviously this scares Max into thinking her parents won’t accept her for who she is and most definitely the kids at school. It’s an ongoing battle she’s had to find herself which truly sparked in the likes of Reagan Cromley. Max was the “secret admirer” that people often talked about, sending her cutesy gifts and lovely letters. It sounds creepy but Max was falling in love but her world broke apart when Reagan died. She can’t fathom how her death was easily ruled as a suicide and no one has delved into what her life was like; perfect. Max has no doubts it was murder and would do just about anything to catch the killer.
Face Claim: Alycia Debnam-Carey

Are you interested in playing the killer?: Not so sure — on the fence.

Name: Noah Westbury
Age (16-18): 16
Sexual Orientation: Straight
Character Traits (combination of positive and negative): Flexible, Humble, Skeptical, Quirky.
Biography: Noah is an only child, the son of a stay-at-home mom & web-developer father. He's always had a fascination with computers due to having accompanied his father on take your kid to work day a few times in the past. Noah's usually been seen in school as one of the smarter-geeky kids, but he doesn't mind, would rather not be the center of attention like others. Noah knew of Reagan Cromley through being asked to tutor her a little while back, which he agreed to. They were acquaintances at most, never speaking much outside of sessions. After it came to light that Reagan committed suicide, he wondered if there's more he could've done, but now with whispers of someone having possibly murdered her, Noah isn't sure what to actually believe.
Face Claim: ​Rhys Matthew Bond

Are you interested in playing the killer?: Definitely!

Name: Martin Hudspith
Age(16-18): 18
Sexual Orientation: straight
Character Traits (combination of positive and negative): arrogant stuck up levelheaded intelligent

Biography:he is a only child born to very rich parents his Father's business is second only to Blake Industries in terms of wealth and he is resentful of the fact that his family is not the richest he is popular in school and uses his vast wealth to stay that way he is an eccentric dresser and person who doesnt conform to the norm of how people should behave he isnt into any sports as he sees it as lowering himself to get involved. When he isnt terrorizing the school he can be found hosting parties since his parents are rarely around

Face Claim:Benedict samuel



Are you interested in playing the killer?: yes

Name: Pansy Pippin
Age(16-18): 17
Sexual Orientation: Straight
Character Traits (combination of positive and negative): Fiery, self-indulgent, ridiculous, youthful, polished, precious.
Biography: Pansy is a member of the Neapolitans, a trio of nasty girls whose namesake comes from their respective hair colors; Pansy is the Strawberry. The Neapolitans are relatively popular and believe Raegan's death has left enough room for them to claw to the top of the social ladder. Pansy's parents operate an overtly successful vineyard, and she is used to an upper-class lifestyle. She has too many Twitter followers and has recently lodged her request to be officially verified. She's always expected her social media popularity to inflate her high school social status, but it hasn't really followed through. Pansy didn't know Reagan all that well, but she still didn't like her; anybody who isn't a Neapolitan is just in the way, irrelevant, or both. Despite her tendency to be over-the-top and haughty, she definitely thinks Strawberry is the sweetest flavor.
Face Claim: Sophie Turner

Are you interested in playing the killer?: Ya, okay

Name: Kennedy Knowles
Age(16-18): 17
Sexual Orientation: straight
Character Traits (combination of positive and negative): hilarious, uppity, fake, charismatic, outgoing
Biography: Kennedy is a member of the Neapolitans, a trio of nasty girls whose namesake comes from their respective hair colors; Kennedy is the Chocolate. The Neapolitans are relatively popular and believe that Reagan's death has left enough room for them to claw to the top of the social ladder. Kennedy comes from old money and her family has a fortune that rivals the Cromley family. She is outwardly bratty and carries herself with a sense of entitlement; she thinks she's hot shit because she shares a last name with Beyonce. Kennedy is actually kindhearted and good natured, but has found that has gotten her nowhere in life. She's charismatic and overly ambitious, and has adjusted her attitude for success. She never liked Reagan or her split ends and feels like her death is nothing but a benefit to herself and her catty friends.
Face Claim: Scarlett Byrne


Are you interested in playing the killer?: Kennedy is capable of anything

Name: Uriah Kim
Age(16-18): 16
Sexual Orientation: Bi-Curious
Character Traits (combination of positive and negative): Egotistical,Charming,Over Dramatic,Fearless
Biography: Uriah never had anything given to her- sure her parents had money, but they didn’t want to do like most parents who had one child and spoil them. They wanted her to work for what she wanted. She painted a picture for them of confidence and over achieving. But in reality she was selfish and a Drama queen. She though was fearless had very little confidence in the challenges she had just completed. Like sure she could do the things she just lacked self esteem. This is all due to the passing of a cousin when she was little. And Reagan,a friend she knew since a young age, now gone - doesn’t help the matter.
Face Claim:

Kyal Legend
https://i.pinimg.com/564x/19/73/68/1973685740950568aed0af9de213d2cf--legends-medium.jpg

Are you interested in playing the killer?: Of course

Name: tanya turner
Age(16-18): 16
Sexual Orientation: straight
Character Traits (combination of positive and negative): lazy,observant,funny,a slob, selfish
Biography: Tanya lived the perfect life,the perfect house, and the perfect family with her rich parents.She was the talk of the Town the one everyone hanged out with the one everyone wanted to be friends with.Then she went to Woodside school were her life turned upside down her parents got a divorce.Then in her school she was constantly teased by the Neapolitans as the girl who finally gets a reality check.She had one friend that fucking left her behind  in the social rankings Reagan Cromley. When she died was Tanya upset a little but she was filled with anger  from the years Reagan Cromley never noticed she existed.So she said hell to it all I don't care if Reagan died.All she wanted was that Reagan would notice her again.
Face Claim: Dakota Fanning

Are you interested in playing the killer?: Hell yah

Name: Maude Michaels
Age(16-18): 17
Sexual Orientation: Straight
Character Traits (combination of positive and negative): Abrasive. Calculating, Brutal, Confident and Clever
Biography: Maude is the leader of the Neapolitans, a trio of nasty girls whose namesake comes from their respective hair colors; Maude is the Vanilla. The Neapolitans are relatively popular and believe that Reagan's death has left enough room for them to claw to the top of the social ladder. Maude's father owns the New England Patriots football team; Tom Brady was at her 16th birthday party, and she'll never let you forget it. She came up with the Neapolitan name in Jr. High and it eventually caught on when the girl's chests began to fill out. Maude is determined to take the Neopolitan's to the top no matter what gets in her way, even the reputation of a dead girl.
Face Claim: Nicola Peltz

Are you interested in playing the killer?: Obviously

Name: Asher “Ash” Pippin
Age(16-18): 17
Sexual Orientation: Bi on the low
Character Traits (combination of positive and negative): Cocky, Courageous, Flirtatious, Competitive And Nosy
Biography: Ash is the brother of Strawberry 🍓 Aka Pansy. They have there similarities but also there differences. Ash plays any sport he can he is overly competitive and it can sometime get in the way because losing isn’t his thing. Ash like to have any fun possible whether it is boning the next chick in line or having his undercover discreet fun with random dudes. Ash has his secret his biggest worry is if his secret gets out. Will Ash get through without his secrets being dropped and will he get to take a lick of some chocolate or vanilla ice cream 🍦
Face Claim: KJ Apa

Are you interested in playing the killer?: ofcourse

Name: Jessica Oliver
Age(16-18): 17
Sexual Orientation: Straight
Character Traits (combination of positive and negative): cunning, manipulative, outgoing, ambitious, distrustful
Biography: A "friend" of all but close to none, Jessica is at the center of Woodside's information web. A girl with a talent for finding out other peoples' dirty little secrets, Jess has used her skills to not only amass a wealth of intel about the public and private lives of the students around her, but has also used this knowledge and the threat it poses to solidify a spot for herself in Woodside's elite social scene, making herself a person that everyone aims to be on the good side of. Very few people have ever gotten close enough to her for her to be truly genuine, and Reagan was one of these people, being one of the even rarer few Jess is willing to actually call a friend. Being surrounded by a majority fake, two-faced group of peers, she very rarely feels remorse about her passion project, but when she gets genuinely close to someone, their secrets are safest with her.
Face Claim: Janel Parrish

Are you interested in playing the killer?: Mais yea

Name: Sabine Donatella
Age(16-18): 18
Sexual Orientation: Bisexual
Character Traits (combination of positive and negative): Intuitive, Witty, Whimsical, Laid-Back, Judgmental, Snarky, Sassy, Laid-Back, Sarcastic
Biography: Sabine is relatively new to Charity, only having lived there a year. Her and her wealthy parents made the move after she was kicked out, or by her terms "withdrew", from her last school after a bullying scandal that she was not a victim of, but started. After a few snide comments from a couple wannabes trying to fit in at her last school, Sabine published an online article reading each and every one of the girls, causing them to be publicly shunned, bullied, and outcast. When asked to reflect upon her actions, her answer was simple: "It's not my fault they were too sensitive to handle a little truth." Ever since then, however, Sabine figured it was better to catch flies with honey than vinegar and decided to turn over a new leaf, at least partially. Instead of focusing on putting others down and making sure she rises to the top, Sabine decided to simply be herself, which actually drew her to Reagan, who inspired her to forgo her ways of trying to make sure she was cool and relevant. This ended up helping in the long run, since Sabine no longer tries to be popular but her naturally witty, eccentric, and sassy personality still causes people to be drawn to her without thinking of her as a try-hard.
Face Claim: Summer Bishil

Are you interested in playing the killer?: Whatever ya need

Lucia Lemaire
17
Bi
Friendly, shyness, patient, moody
Lucia lived in France through her childhood till the sudden of her mother passing from a car wreck. That left Lucia with no relative - oh so she though. The social worker reach to a father she never knew or of her mother ever spoken about him. After a few days of packing whatever she needed, she heads of on a plane to New England where she didnt meet her father at the airport but his driver.
She then finally meets him who is the owner of a brewing company and rich. To which Lucia never had that luxury or money. To also accompany with her father at some high end party, where she met reagan who gave her the tour of the town and such. To shortly after a few days, she heard the passing of reagan. Now she is still trying to adjust into this lifestyle and hopes for the best

Lucy hale


Maybe

Name: Royce Emerson
Age(16-18): 16
Sexual Orientation: Straight
Character Traits (combination of positive and negative): Royce is very bubbly, energetic, outgoing, spunky, also rude, bitchy, mean.
Biography: Royce is on the cheer team, she is a IT girl. She knows what she wants and she takes it. She doesn't take no for an answer. She grew up very wealthy and well off. She has a stuck up attitude, and can be very superficial. She has one younger brother. She can get along with everyone, but she is totally being fake. She is a wild party girl, she likes to start trouble here and there. She is also a member of the ASB, and on the soccer team. She broke up with her boyfriend of two years and is ready to have more fun
Face Claim: lauren jauregui


Are you interested in playing the killer?: Yes!