- Wayne Munson: Eddie’s uncle, factory job guy and the best caregiver as we all predicted. Wayne’s a quiet guy, very emotionally reserved too. Eddie says he’s never even heard Wayne yell, he’s non-confrontational. He doesn’t like Al, says nothing even when Al tries to instigate an argument. He deeply cares for Eddie. Eddie is very stubbornly independent, so used to being on his own because of Al, and Wayne tries to respect his boundaries while also being concerned, as Eddie gets very prickly about it. He tries his best to keep Eddie from getting roped in with Al, but overall he lets Eddie make his own decisions. He seems like he wants to just bundle Eddie in a hug at times, but they're not to that point yet in the book. In the end, Al's scheme gets their house burned down, so Wayne permanently takes Eddie in. He shapes Eddie by telling him he’s not his dad and to stop caring what people think and not to put himself in a box. Some nice tidbits: Wayne has a green thumb, reads Gardener’s Weekly magazine and goes to a bar called the Attic on Fridays.

- Ronnie Ecker: Eddie’s childhood best friend. She lives with her grandma in the trailer park. Her father passed away and her mother is implied mentally unstable. She meets Eddie when they’re 8. She’s described as tall, taller than Eddie since they were kids, always wearing a corduroy hat, and people mistake them for siblings. She’s the first drummer of cc. Ronnie and Eddie formed the band specifically because they had to do the middle school talent show. Then Gareth becomes the drummer when she graduates. She’s also in Hellfire, wants to go to law school and has a full ride scholarship to NYU. She’s sort of implied aro/ace after Eddie tries to kiss her when they’re 13, she says it’s not just Eddie, she doesn’t think she’ll ever have a crush on anyone. Ronnie is perceptive and smart and she teases Eddie a lot but they’re very protective of each other. Eddie gets blackmailed by Principal Higgins into dropping out when he threatens to jeopardize Ronnie's scholarship. Eddie never tells Ronnie this, even when they have a fight about him choosing to end Hellfire because Higgins convinced him his friends would be better off. This causes them to leave off on vague terms when she goes to NYU.

- Dougie Teague: This could possibly be unnamed freak from the show, but there’s an age discrepancy because he’s the same age as Ronnie and Eddie in the books and it says he graduates. So he would have to fail senior year twice along with Eddie to still be in high school in the show as unnamed freak. Dougie is the backup cc guitar player, whereas unnamed freak played bass in the show. Dougie is brash and blurts things out. He lives where Eddie calls the nice side of town and they rehearse in his garage. Dougie’s mom is not fond of Eddie but lets them practice there. Dougie’s dad is an HVAC truck guy.

- Jeff (no last name): Jeff is a sophomore and the bass player for CC, whereas in the show he plays guitar. Jeff comes across as reserved compared to Eddie and Ronnie. He played D&D with his older brothers before joining Hellfire. Eddie says Jeff knows more about bass than him. Jeff is ‘the nice one’ and generally nervous and anxious. He’s reasonable but he looks up to Eddie and buys into what Eddie says about the band getting a deal even if it’s unrealistic. Jeff is awkward around girls, wants to do good in school and he’s afraid of getting in trouble. The owner of the Hideout bar lets the band split a beer and Jeff is nervous the whole time. Also, when Eddie screws up, Jeff is the first to forgive him.

- Gareth (no last name): Gareth takes on the role of Eddie’s first sheep, whereas everyone else are Eddie’s friends, Gareth is like the little kid he’s fond of. Gareth is a freshman, there’s a whole scene of Eddie helping him create a D&D character. He’s hotheaded and a target for bullies. Eddie sticks up for him a couple times, and once, Gareth barrels in shrieking and throwing windmill punches to stop Eddie from getting jumped by Tommy H and crew, which results in Gareth going to the hospital with a fractured wrist.

- Rick Lipton (Reefer Rick): Rick is a very typical laid back stoner character. He's around 35, described as a giant soft guy with big smiling eyes and friendly face, wearing a Smokey the Bear shirt, and not what Eddie expected from a drug dealer. His house is also not what Eddie expected, being pretty clean compared to Eddie's teenage inhabited space. Eddie meets Rick through his dad, who has screwed Rick over in the past and this makes Rick unwilling to be the buyer of what they're going to steal off the drug truck. Eddie however puts on his best "Munson Magic" and convinces Rick. Rick is impressed and calls him Munson Junior, which Eddie hates. He goes back to Rick at the end of the book, needing money and a job. Rick gets him started dealing.

- Elizabeth Munson (maiden name Franklin): Eddie’s mom, he's a certified mama's boy. She doesn't appear in the book, Eddie says she got sick and passed away when he was around 6. She's originally from Memphis, Tennessee, where she met Al and they moved to Hawkins when she was 19, they got married March 12th, 1966. She loved Eddie's dad but Eddie says Al was always leaving her to go off on schemes. She passed her love of music onto Eddie. Her favorite was Chicago blues, Eddie didn't understand why until she passed and he started to feel it in his bones too. Eddie remembers dancing with her to Muddy Waters' "Rollin' Stone" and when the song comes on in the truck while he's doing business with Al, it makes him tear up. He recalls this memory several times, it seems like it’s his happiest memory. He says "When Elizabeth Munson was happy, the whole entire world was happy." His biggest connection to his mom was through her music. Then when Al's scheme goes wrong, the people he screwed over show up and burn down their house in an act of revenge. Eddie almost gets killed trying to save his mom's records, but they burn.

- Paige Warner: Paige is a junior scout at WR Music. She's not described beyond having freckles, chin-length dark hair and dark eyes. She has a younger brother on the Hawkins baseball team. At the Hideout, she sees Eddie's band playing and he chalks up the courage to talk to her. (He's squeaky and blushy, no game) Paige is in town for her grandmother's funeral, she remembers Eddie from the middle school talent show, though she is two years older. She likes his band because they're "real". She returns another night and Eddie (after some bad news that makes him desperate to chase his future) propositions her to get them a record deal. She's insulted, having told Eddie that guys use her for that reason, but they agree to work together. Paige pays for the studio time for cc to record the demo tape. In the meantime, Paige meets Al and Eddie is beside himself the entire time, not wanting her to find out the dirty work they're doing to fund his future. Then, Paige's boss only likes Eddie, and when she delivers this news, Eddie expresses that he doesn't want to ditch his band, but she says this will benefit both of them. So he agrees and it's implied they start hooking up, never making things official. She leaves for California and he's supposed to go later for his audition and stay with her. This doesn't happen, Eddie's heist with Al lands him temporarily in jail, and over a heated phone call, things end between them. It's implied that Paige pays his bail but never speaks to him again.

- Tommy Hayes: It's debatable whether this is supposed to be Tommy H from the show, whether his last name was always Hagan or if that was a fanon thing. Given his proximity to the jocks and being bitter that Steve has changed since dating Nancy, it's supposed to be Tommy H from the show. He's extremely violent in the book, which doesn't track so much with Tommy in the show, who's more of a shit-talker lackey. This Tommy bullies Eddie for being poor, a freak, and the son of a criminal. He bullies the whole Hellfire club and beats Eddie up on two occasions, punches Ronnie (accidentally?) when she tries to protect Gareth, and puts Gareth in the hospital. He faces no repercussions because the Principal is on his side, as Tommy's family is influential and rich.

- Principal Higgins: The principal of Hawkins High. Eddie is justified for wanting to flip him off in the show. Higgins has a ton of favoritism toward the kids from well off influential families, like jocks and preppy students, and always takes their side even when Eddie (and friends) are the ones bruised and beaten. He's a Bible thumper and hates Hellfire and also hates Eddie because he's a Munson, considers him a rotten apple that poisons the bunch. He wants Eddie to drop out to rid the school of the Hellfire club. After the brawl between the jocks and Hellfire, Higgins convinces Eddie that it's his fault his friends are considered freaks and get bullied. He blackmails Eddie into dropping out by threatening to jeopardize Ronnie's scholarship to NYU. Eddie eventually comes to his senses and finds his fire again when everything falls through. He gets re-enrolled in school and turns things around by blackmailing Higgins. At this point, he knows Higgins buys drugs from Reefer Rick, and uses that information to force Higgins to let Hellfire continue and leave him and his friends alone.

- Officer Moore: A Hawkins cop who has it out for Eddie. He's described as having a blond buzz cut, a square jaw, Superman level All-American looks. He has a growing mid-forties beer gut. He pulls Eddie and Ronnie over in Eddie's van, Eddie sasses the shit out of him since apparently he pulls Eddie over a lot trying to find reasons to arrest him, just because he's a Munson. But he has to let them go.

- CJ and Toby: These are two goons that worked with Al under the same boss, Charlie Greene, one of the biggest drug kingpins in Oregon. They are transporting the truck with the drugs that Al enlists Eddie to help him rob. Eddie and Al successfully rob the truck, but CJ and Toby show up to their house days later. While holding Eddie and Al at gunpoint looking for the drugs, It's revealed that Al didn't owe money because he borrowed it, he stole it because he got greedy. Eddie was under the impression that he was saving his dad from enforcers that would come to collect the debt eventually, not helping him steal more from them. Al wasn't in prison like he told Eddie, he was living large as Charlie Greene's right hand man, never sending Eddie a dime. At this point, Eddie and Al have already sold the stolen drugs to Reefer Rick, so Al turns over the 15 grand of money to CJ and Toby. They think it's settled, but CJ decides to set the house on fire too, since Al embarrassed them with the boss. The only reason they don't kill Eddie and Al is because Officer Moore shows up, having been following Eddie. Instead, CJ shoots Officer Moore in the leg and then he and Toby flee. Eddie immediately goes to help the officer (despite hating Moore) while Al is telling Eddie to come on so they can run. Eddie feels like its their fault Moore was shot and won't leave him, Al says he didn't realize Eddie was this much of a fool. Eddie tries to get him to stay because he needs him, but Al leaves him anyway and Eddie is devastated and numb. He's arrested when cops show up.

- Jim Hopper: Hopper brings Eddie a cup of water and talks to him while he's in lockup for the night. He calls Eddie "Junior" but Eddie's too numb at that point to care. He says they know that Eddie tried to help Moore, but he's being held for arson because of the house, until he makes bail. Hopper is really trying to give Eddie a break, knowing he helped Moore, and talks a bit about Eddie's dad. He says something cryptic about knowing Al in school and how every time something went down, Al was usually at the center. Hopper does Eddie a favor and lets him use the phone in his office, where Eddie calls Paige. Hours later, Hopper tells him he made bail and that Wayne is there to get him.

- Chrissy Cunningham: Eddie remembers Chrissy from the talent show. Eddie's dad was supposed to be there, but didn't show up, meanwhile Chrissy is disappointed that her mom did show up. A lot like the show, it's minimal but Chrissy is sweet with troubled undertones. Eddie's surprised she even talks to him, but she's nice and says she'd cheer for him if his dad didn't show. Fast forward to high school, when the jocks are giving Eddie flack, Chrissy tries to get them to stop. Then they try to lie to the principal and say Eddie was bothering Chrissy. Chrissy says it's a lie but Jason quickly silences her.

- Bev: The owner of the Hideout bar. She's a very no nonsense drill sergeant kind of lady. She keeps Eddie humble, calls him Junior despite him asking her not to, always tells him to get a haircut and doesn't like his band at all, though she lets them play there as part of the exchange for Eddie working there. The stage is just some rickety wood that her late husband built. It's implied she had something to do with his death. She's strict and doesn't give anything out for free, only Al is able to charm her out of a free pitcher of beer when he's celebrating Eddie (temporarily) dropping out of school, which stuns Eddie. When Eddie quits the job chasing his California dream, she admits she'll miss their band and that's that.

- Janice: Principal Higgins secretary who equally hates Eddie and favors jocks and preppy students. She wears coke bottle glasses that magnify her eyes and has a fanatical obsession with purple.

- Stan: A junior member of Hellfire who had to sneak around his parents to go to meetings by pretending to be at algebra tutoring, as they consider D&D to be Satanic. When his parents find out, they write a letter to the school, condemning Hellfire club and saying they sent Stan to a church program to cleanse him. Higgins shows Eddie this letter to make him feel guilty and responsible.

-Nicole Summers and Cass Finnigan: These girlies are mentioned in one sentence but I don't know where else to put this info. Eddie implies these are the two other hookups he had before Paige, once in grade ten and once senior year, saying that he could tell they were only doing it for the dare of getting with the freak. Though, he wasn't looking to be anybody's boyfriend. He compares them to Paige, who he feels like genuinely likes him

- Steve Harrington: He doesn't actually appear in the book but his balls get a mention so he's going on the list. The only thing to note is that Steve doesn't approve of any freshman getting beat up, to the point where the jocks do it behind his back and Jason Carver is worried about him finding out. Tommy says Steve doesn't have any balls since dating Nancy Wheeler. Eddie defends Steve's balls, saying Tommy can't talk about someone else having no balls when he gets his kicks beating up freshman.

- Will and Jonathan Byers: At the end of the book, in a record shop, Will and Jonathan walk in. Eddie recognizes Will from his missing posters and recalls the events where Will had a funeral yet somehow was found alive. Jonathan goes to the back for a certain record, and while Will is alone, Eddie watches as a few younger jocks come into the store and start hounding him, calling him zombie boy. Eddie takes up for him, goads the jocks and gets them to take it out on him, takes a baseball to the chest and they leave. Eddie tells Will that Zombie Boy is metal as shit and Jonathan thanks Eddie when he comes back. Eddie offers Jonathan weed and says Jonathan is way too offended by the question for someone with his haircut. This whole interaction solidifies Eddie's new sense of purpose, collecting and protecting sheep.