Tom Hanson started out as a patrolman with horrible luck (and fellow partners getting their noses broken) and initially no one, cop or criminal, took him seriously as a (uniformed/patrol) cop, due to his youthful appearance. After one incident too many, he is assigned to Jump Street Chapel to begin undercover work. It's a rocky start, but he manages to get the hang of both reliving school life over and over again with each case, and the antics of his fellow cops.
- Bash Brothers: When he and Penhall are undercover as the McQuaid Brothers, they're always seen together, act very brash, and intimidate the other kids. They do a lot of good while acting so though, solving their police cases in a kickass way and even helping some extra people along the way. note
- Beware the Quiet Ones: Part of his persona as Tom McQuaid. So people would question why the McQuaids have a bad reputation.
- Break the Cutie: He starts the series out as a well-spirited and motivated man. But during Season 2 and 3 he is broken down by, amongst other things: having his girlfriend shot dead in front of him in a mugging and his guilt over not having been able to prevent it, causing him to slip in a PTSD-like state for a while ("Orpheus 3.3"); an undercover operation in a mental institution gone wrong causing him drugged off and lost in the system ("I'm OK, You Need Work"); an undercover operation in juvenile prison making him cynic / doubtful about whether what he's doing as a cop is actually making lives better ("Swallowed Alive"). But the straw is the Season 3 finale ("Loc'd Out"), in which he is wrongfully convicted for murder and sent to prison even though innocent. Beginning Season 4, he's proven innocent, released from prison and returns as a police officer, but the rest of Season 4 he seems a darker, broodier version of himself with a permanent expression of chagrin on his face. He keeps mentioning during Season 4 that he wants to quit the police force. Beginning Season 5, he's suddenly disappeared without explanation and his co-workers seem unaware he's ever existed. note
- Character Tic: He likes to sit on tables, even when there are chairs available. Nearly every episode has shots of him sitting, often with his legs crossed, on a table while the rest of the team either stand around him, or sit on chairs.
- Cowboy Cop: Often goes against the rules, but with good intentions. Amongst some of the things he is called in and berated for by Fuller:
- Breaks-and-enters into Booker's apartment when he suspects Booker is a menace to the team, and finds out Booker's real agenda that way.
- Keeps from Fuller that a girl he meets while undercover tries to make him an accomplice to a crime, even though he's supposed to report such things (because he rightly figures out she's abused at home and wants to help her with that). And then intimidates another police office to release her file to him even though he rightfully isn't allowed to access it.
- Disappeared Dad: Hanson's backstory, as his father died on the job as a police officer when Hanson was 16; his father apparently was a big inspiration for Hanson to chose to become a police officer.
- Peek-a-Bangs: In Season 4, he has a hairstyle with long bangs that sometimes cover one of his eyes. His character had always been on the shy side, but by Season 4, he is actually getting obstinate, saying he doesn't want to be a police officer anymore, and covering his face with his bangs seems to symbolize this. note
- Red Oni, Blue Oni: Hanson is a by-the-book and almost introverted guy, and as such contrasts with Penhall, who's an easygoing but fiery guy. They still work together very well as cops, and even are each other's best friends. This dynamic becomes downplayed in later seasons though, as Hanson becomes much less "uptight", while Penhall becomes more serious, especially when he adopts Clavo and so becomes a father.
- Sesquipedalian Loquaciousness: At the beginning of the series when he still is more "uptight", he speaks in long sentences and difficult words. Subverted when he joins the Jump Street program, so has to act like a teenager, and he loosens up. From the pilot episode:Hanson: [To a teenage girl who's the sister of a victim] Do you think there may be the possibility of your older brother Kenneth having previous knowledge of the suspected purpetrators?Hanson's partner: [Eyerolls and turns to girl] In other words: Did he know these jerks who ripped off your Dad's car?
Doug Penhall is already on the Jump Street team when Hanson joins it at the start of the show. They are rivals at first, but quickly become the best of friends. They even come up with their alter ego's the McQuaid Brothers. Doug is the foil to Hanson's Straight Man both on and off case.
- Alcoholic Parent: His mother was an alcoholic. Even worse, after her death his father became an alcoholic too, and according to Penhall himself "drank himself to death".
- Bash Brothers: When he and Hanson are undercover as the McQuaid Brothers, they're always seen together, act very brash, and intimidate the other kids. They do a lot of good while acting so though, solving their police cases in a kickass way and even helping some extra people along the way. note
- Berserk Button: He hates bullies, and whenever he has to go undercover as one, he becomes more or less an anti-bully, going out of his way to help out the little guy.
- Beware the Silly Ones: He seems kind of silly at first sight, especially compared to the straight-laced Hanson, because he acts so goofy. However, he still is a badass cop who can kick ass both verbally and physically.
- Deadpan Snarker: Often makes snappy, sarcastic remarks.
- Hanson shows up at Penhall's house all dressed up to go (with Penhall, he thinks) to a funeral, but finds Penhall boxing, wearing a minimal, sweaty sporting outfitHanson: You're not dressed!?
Penhall: What am I boxing in the nude?!
- When ghost buster look-a-like Environmental Protection Agents suddenly show up at 21 Jump Street to inspect toxic waste that would be there:Captain Fuller: What I haven't heard of anything...
Environmental Protection Agent: Well it happened 15 year ago...
Penhall: Good to see you guys are right on top of it!
- Hanson shows up at Penhall's house all dressed up to go (with Penhall, he thinks) to a funeral, but finds Penhall boxing, wearing a minimal, sweaty sporting outfit
- Friend to All Children: He gets along better with kids and teens than he does with adults. He cares for the teenagers he works with, and easily bonds with them.
- Henpecked Husband: His girlfriend Dorothy acts very domineering, sometimes even condescending towards him. This already begins when she first shows up: she moves into his house uninvited. And sleeps in his bed while (initially) exiling him to the couch. The relationship ends when she throws him out of the house they've bought together.
- Missing Mom: Penhall's mother died when he was six, and in one episode he talks about how he couldn't comprehend that at first as a child, and about the impact it had on him growing up.
- Parental Substitute: Ends up as the adoptive father of Clavo, and eventually quits the force to spend more time with him.
- Red Oni, Blue Oni: Penhall is an easygoing but fiery guy, and as such contrasts with Hanson, who's more by-the-book and restrained. They still work together very well as cops, and even are each other's best friends. This dynamic becomes downplayed in later seasons though, as Hanson becomes much less "uptight", while Penhall becomes more serious, especially when he adopts Clavo and so becomes a father.
- Relationship Revolving Door: Penhall and his girlfriend Dorothy break up and get back together a few times during Season 2 and 3, and he says about her:Penhall: I've been with her for [a decade], but never any longer than 6 months at a time.
- Sad Clown: Covering up an awful lot with jokes. He's a jolly guy, but has a tragic past; amongst other things, his mother committed suicide when he was 6 and he's estranged from his brother.
- Fair Cop: She's a cop, and the fact that she looks attractive even helps her in her cases. It even sometimes was exploited when she played the Dirty Harriet. And as Penhall remarks at a certain point, it doesn't say anything about Booker that he's flirting with Judy because "everybody always flirts with Judy!".
- The Smurfette Principle: The only female officer on the Jump Street squad, except for the two-episode appearance of Officer Rocky late in the run.
- Twofer Token Minority: She's a minority as an African-American and also as a woman (within the police force, where only a minority of officers are women). This is Lampshaded in an episode where both she and Doug apply for a promotion to Detective and she's chosen while he's not, which makes Doug remark that she got chosen because she's both black and a woman. note
- All Asians Know Martial Arts: He is Asian and an avid practitioner of martial arts. It comes in handy a few times, such as when he gets into fights and when he (undercover) joins a civilian neighborhood watch and impresses the recruiter with his kick-ass skills.
- Asian Drivers: In the pilot episode, Ioki drives like a maniac and makes a couple of quips about this stereotype. This is immediately undone in the first real episode.
- Dark and Troubled Past: As per "Christmas in Saigon", it's revealed his parents were killed in front of his eyes in the Vietnamese war and he escaped to the U.S. by himself as a teenager.
- Dead Person Impersonation: "Harry Truman Ioki" is not his real name, but the name of a deceased man he took over in order to not have a Vietnamese name (which he really had, and which he thought would hinder his being hired by the police). At the end of the episode that reveals this, he legally takes on the name "Harry Truman Ioki" so it becomes his real name.
- Descent into Addiction: Is briefly addicted to painkillers after being shot and seriously injured.
- Elvis Impersonator: Dresses as Elvis for the costumed Halloween episode.
- Flashback Echo: Ioki suffers from some PTSD-related issues after having been shot and in a coma for a while.
- Mistaken Nationality: An odd case where the character purposefully misrepresented himself: he has a Japanese name and pretends to be Japanese, until he's found out to actually be Vietnamese and to have taken the Japanese name and identity of a deceased man.
- Older Than They Look: While all of the Jump Street team has to be older than they look in order to go undercover at high schools as early-twenties-olds, for Ioki this is the most pronounced. He is specifically mentioned to have been working as a police officer for a year longer than his teammates, so he must be older. Also, the Real Life actor (Dustin Nguyen) was the oldest of all the actors playing the team. note
- Two First Names: His given note names are "Harry Truman" (yes, explicitly named after that American president), the second of which also is a last name.
Captain Richard Jenko
The founder of Jump Street Chapel, and its first captain. When Hanson meets him, this undercover unit has been around for four weeks. Jenko beliefs that criminals start out in their youth and had created the Jump Street program for the sole purpose of nipping criminality the bud. He is killed by a drunk driver and replaced by Adam Fuller by episode 7 of Season 1.
- Da Chief: Much less than his later replacement Captain Fuller, but he has his moments of being very stern with his police officers, such as when Hanson blows his first assignment.
- Dropped a Bridge on Him: He is in the first six episodes of the series. Episode 7 however suddenly opens with his funeral. It briefly explains how his character died, then after the opening credits, he is never spoken of again. His character died in a very abrupt way and was gotten rid of unceremoniously.
- New-Age Retro Hippie: Captain Jenko is an aging hippie who, in the first episode, has to teach Hanson how to act like a bad seed.
- The Stoner: Has all the traits of one, but isn't actually one; for one, he is a cop, and he also explicitly says about Jimi Hendrix, whom he otherwise idolizes: "Too bad he wasted his life on drugs..."
Captain Adam Fuller
Jenko's replacement after he dies, and the Captain of Jump Street during all but the first 7 of the 106 episodes. As soon as he shows up, Jump Street Chapel changes from a fun work environment to an actual precinct office.
- Berserk Button: Never harm a member of Jump Street under his watch. In I'm Ok You Need Work he is clearly pissed at what the institution did to Hanson.
- By-the-Book Cop: He's strict about following procedure and expects his Officers to do the same, scolding or even suspending them when they do otherwise.
- Da Chief: Much straighter than Jenko. Though he values his police officers, he is clearly a very strict boss. From the moment he is introduced, he makes it very clear that he means business and giving him any lip is a bad idea.
- Hidden Depths:
- In Woolly Bullies he laments that the reason why he dresses in suits all the time is so his cousin doesn't hassle him into shoplifting.
- To the surprise of his co-workers—because he never revealed anything about his personal life—he turns out to have a teenage son, and to have been married in the past. In Chapel of Love, he reveals the background story that led to his divorce, and his deep regret over it.
- Hidden Heart of Gold: Captain Fuller, when he showed up to replace Captain Jenko, was played as a very stern, strict man and police Captain—essentially the opposite of the Hippie, rocker Captain Jenko. Fuller remained a very strict and by-the-book Captain for the police officers, but throughout the series little bits of background about the man were unfolded that made you feel for him—especially, that he was hurt very much by having his son taken away out of his life after a divorce after he cheated on his wife with a police co-worker (something he confessed to his police subordinates in a Season 2 Valentine episode, and which he still was regretful about). He also despite his strictness was willing to come through for his officers when push came to shove—most notably, in Season 3 ep. 1 when Hanson suspects something is off about Booker, Fuller pulls some strings to find out Booker is from Internal Affairs.
- What the Hell, Hero?: A rare example in which he gives himself that speech when he is arrested for DUI.
The only cop in the unit that doesn't like authority, Booker went from the Internal Affairs unit to Jump Street and later resigned to be a P.I. in an insurance company (which led to his own spin-off series, Booker).
- Badass Long Coat: Booker wears these on occasion, when not sporting a leather jacket.
- Break Out Character: He was meant to be this to replace Hanson and later had his own Spinoff. It only lasted a year.
- Shoo Out the New Guy: He joins the Jump Street team as an additional member at the beginning of Season 3, but barely lasts a season before he is written out and goes away, leaving the team in its original composition.
- You Need to Get Laid: Booker expresses this sentiment when he hooks up the married Sal Banducci with a woman he tells Sal is his cousin, but in reality is an escort hired by Booker, who ends up sleeping with Sal. Booker thought Sal having sex (or at least, having a date) with another woman once, would spice up Sal's marriage, but it turns out Sal's guilt over having slept with another woman makes Sal feel worse off.
Sal "Blowfish" Banducci
The janitor (NO, maintenance engineer!!!) of Jump Street Chapel. He has the nickname "Blowfish" due to his ability to make a blowfish like funny face on glass.
- Almighty Janitor: He's a janitor / "maintenance engineer", and sometimes abuses that position (though with good intentions) - such as when he opens a confidential police ballistics report in The Dragon and the Angel, and when he purposefully mishandles evidence in In the Custody of a Clown so that an innocent man won't be convicted.
- Babies Ever After: He has a lot of children with his wife (whom he is happily married with) - including a little son who looks like a cardboard copy of him. Ironically, he was originally forced to marry his wife because her parents though he had gotten her pregnant; but he hadn't, and the babies only came after they were married.
- Insistent Terminology: Corrects anyone who calls him janitor, insisting on being a "maintenance engineer".
- Irony: Back when he was a teenager, he and his then-girlfriend wanted to have sex one night. Before that happened, her parents found them in bed and, refusing to believe they hadn't had sex, made them marry... so that not only the couple did NOT have sex that night, but they actually married still being virgins.
- One Of These Things Is Not Like The Others: The only named character in the main cast to not be a cop.
- Shot Gun Wedding: Played with. As he tells in Chapel of Love, he and his then-girlfriend were teenagers when they were found in bed by the girl's parents. The parents couldn't be convinced that the couple hadn't had sex (which they hadn't), and forced the couple to marry. Which led to them ironically both being virgins at their wedding. They were happily married though, and did have a lot of babies after getting married.
- Signature Move: His "blowfish" face he makes by pressing his face against glass and which got him his nickname.
An old friend of Hanson's who shows up in a Season 2 episode to go on a road trip with Hanson. He returns once more in a Season 3 episode, when it becomes clear that he spilled the beans about the Jump Street program by writing about it in a magazine, and Hanson goes to confront him about that.
- Cloudcuckoolander: Russell acts weird, as often noted by other characters, and has unusual speech patterns.[REPEATED line by other characters about Russell] Who IS this guy?!
- Full-Name Basis: He is always referred to by his full (both first and last) name by everyone on the team except Hanson (who already knew him before he appeared in the series). It probably signifies that he's an outsider, not being part of the team or even a cop, and that Hanson's friends/co-workers seem weary of him.
- One-Shot Character: Technically, two. He solely appears in two episodes, but owns these—both episodes' titles have his full name in them, and he greatly influences Hanson in both of them.
- Shipper on Deck: He urges Hanson to go try get back an ex-flame of his. Inconveniently, she's is about to get married to someone else at that point in time, but Russell believes Hanson and she should be together.
- Toxic Friend Influence: In the first episode he appears in, he convinces Hanson to skip work, ignore a court order, get drunk and get a tattoo, and crash a wedding. In his second episode, it turns out he betrayed Hanson by writing about the Jump Street program in a magazine after Hanson told him about that confidentially, and Hanson gets into big trouble because of it. As the other Jump Street team members note, he's a bad influence on Hanson.
Fuller's replacement in 2012, he helps the new members try to be kids again in order to be more competent undercover cops.
- Angry Black Man: Invoked, he knows it's a stereotype, but it doesn't stop him from being one.
- Badass in Distress: In the second film, Mercedes holds him at gunpoint, taking him as a hostage and shooting his foot just when he tells Maya to escape and prevent from being a hostage. He gets a good deal of snark back at her.
- Berserk Button: It's hard not to push his as there are so many. Also, in the second film sleeping with his daughter and high-fiving him about it, as Schmidt found out the hard way.Dickson: Stop fucking with Korean Jesus, he ain't got time for your problems.
- Da Chief: Naturally.
- Deadpan Snarker: Almost half of what Dickson says is snark. The other half is profanity.
- Hair-Trigger Temper: Nearly everything sets him off.
- Jerk with a Heart of Gold: He's loud-mouthed and insulting, but generally means well. However, the second film ups the "jerk" aspect, having him hit Schmidt and promptly tase him in the penis for unknowingly accepting his daughter's come-on to have sex.
- Papa Wolf: He is VERY pissed off when he finds out that Schmidt slept with his daughter.
- Sir Swears-a-Lot: Nearly every muthafucking single sentence Dickson says tends to have "motherfucker" in it (what did you expect with someone played by Ice Cube?).
- Tranquil Fury: When learns of the incident that got Schmidt and Jenko expelled from high school they expect him to yell at them like usual. Instead, he simply and calmly tells them that they are fired, but does in at tone that signifies he has had enough of their fuck ups.
- Hilariously subverted when he learns that Schmidt had slept with his daughter. He tries to keep a calm composure in front of her and Schmidt, but the moment he steps out, he goes BALLISTIC destroying the buffet and screaming his vocal cords so loud that everyone can hear them.
A former nerd turned cop who befriends his bully Greg Jenko. After graduating, he and Jenko go to Jump Street when they screw up the Miranda Rights. What he lacks in strength he makes up for in intelligence.
- Anti-Hero: Morton's an undercover cop trying to bring down drug rings, but with that said, he has no problem bringing alcohol and marijuana to his party to give to teenagers.
- Amazingly Embarrassing Parents: Morton's parents are this, especially his mother.
- Badass in a Nice Suit: During the first film's climax, he wears a smart white suit for the prom night.
- Bash Brothers: Is this with Jenko.
- Becoming the Mask: Even if Eric was a drug trafficker, he was starting to get in good terms with him and wanted to surpass his University entry exams.
- Born in the Wrong Century: Or decade, in this instance. When he is introduced as a high school student in 2005, he is a loser for being a nerd. When he goes back to high school as an undercover cop in 2012, his nerdiness is now considered cool.
- Brains and Brawn: With Jenko; he helps him study for the police exams, and Jenko helps him train his body.
- Bunny-Ears Lawyer: Despite being rather incompetent in regards to fighting and physical activity, as well as engaging in rather ridiculous activities in the course of his duties, Schmidt turns out to be a great undercover cop when paired with Jenko.
- Crouching Moron, Hidden Badass: Schmidt is actually a decent detective when push comes to shove.
- Dirty Cop: Had no problems bringing alcohol and marijuana to a party full of teenagers to bring down a drug ring. At least he thought that bringing cocaine was a bad idea.
- Fat Best Friend: Is this to Jenko.
- Heterosexual Life-Partners: With Jenko.
- Last-Name Basis: Is referred to as Schmidt or Schmitty, even by his family.
- Like an Old Married Couple: With Jenko. The two of them are undoubtedly very close friends and are more than willing to take a bullet for one another, but that doesn't stop the two from bickering with one another. In fact, in the second movie, the two of them are Mistaken for Gay by a guidance counselor.
- My Beloved Smother: His parents, especially his mother, smother Schmidt with affection.
- Nerd: Schmidt was one in high school.
- Sir Swears-a-Lot: While not as often as Jenko, Schmidt does frequently cuss.
Gregory "Greg" Jenko
A former bully turned cop. He becomes friends with his nerd victim, Schmidt. Word of God states he is former Captain Jenko's son.
- Adorkable: After bonding with the science nerds in his AP Chemistry class, Jenko becomes a huge nerd himself. It even continues into the second movie, where he continues to pal around with them once they become Jump Street Interns.
- Anti-Hero: While he's a cop and is trying to bring down drug rings, he has no problem buying alcohol for teenagers, insulting people to seem cool, and was even about to bring cocaine from an evidence lock-up to bring to Morton's party.
- Badass in a Nice Suit: During the first film's climax, he wears a smart white suit for the prom night.
- Bash Brothers: Is this with Schmidt.
- Becoming the Mask: In the second film, switching the same thing that happened to Schmidt in the first. Jenko was in good terms with the drug trafficker, Zook, and wanted to go further as an University football player.
- Book Dumb: Was held back for two years in high school, and also needed Schmidt's help in regards to his police exams. When in college, he does take a decent interest in his classes.
- Brains and Brawn: With Schmidt; he helps him train his body for the police exams, and Schmidt helps him study.
- Bunny-Ears Lawyer: While Jenko is rather dumb at times, as well as a bit of a jerk, he is also a fairly competent marksman and hand-to-hand fighter, especially in comparison to Schmidt. He's also a decent sports player.
- Corrupt Cop: Is willing to buy alcohol for underage teenagers, and was also about to steal cocaine from an evidence lock-up to give to teens for a party, all for the sake of bringing down a drug ring.
- Dumb Jock: He had terrible grades in high school and mostly relies on his muscles to get him through most situations.
- Heterosexual Life-Partners: With Schmidt.
- Hunk: Something that Captain Dickson points out frequently.
- Improbable Aiming Skills: While he has little else to recommend him as a cop, he's a superb marksman, regularly pulling off extremely difficult shots up to and including a Max Payne-style shootdodge.
- Jerk with a Heart of Gold: Was a bully during high school and made fun of people during high school to seem cool. He still carries on these traits even once he becomes a cop. Even though Jenko is a dick at times, he is still a cop who tries to bring down drug rings, who clearly loves Schmidt like a brother.
- Jerk Jock: Was this in high school, but later mellowed out.
- Like an Old Married Couple: With Schmidt. The two of them are undoubtedly very close friends and are more than willing to take a bullet for one another, but that doesn't stop the two from bickering with one another. In fact, in the second movie, the two of them are Mistaken for Gay by a guidance counselor.
- Sir Swears-a-Lot: Nearly everything Jenko says is laced with profanity.
Deputy Chief Hardy
The officer that assigns Jenko and Schmidt to the Jump Street program.
- Badass Mustache: Most notably in the second film than in the first where he has beard. In the second, he wears the same moustache as Offerman's Ron Swanson character.
- The Comically Serious: Coming from Nick Offerman, he talks in the most deadpan voice and pulls a stoic face remarking Jenko and Schmidt's nonsenses.
- Da Chief: He assigns Jenko and Schmidt to the Jump Street programs.
- No Fourth Wall: Aside from snarking Jenko and Schmidt's comments, his main role is providing the film with funny indirect comments talking about filmmaking and the film industry especially adapting old tv shows to film and sequels."Do the same thing as last time. Everyone's happy."
One of the most popular teenagers in the high school that Schmidt and Jenko infiltrate, and one of the dealers of H.F.S. in the first film. And he is (or was) going to the Berkeley University too.
- The Dragon: He is the one in charge of distributing the H.F.S. in the first film.
- Forced into Evil: The only reason he was selling the drugs was because Mr. Walters caught him smoking marijuana.
- Granola Girl: Is a male version of this.
- Prison Rape: He is afraid that this might happen if he gets caught because of his pretty looks. In the second film, it happens but not in the shower, but as a sex toy for Mr. Walters.
The gym teacher at the high school that Schmidt and Jenko go to while undercover.
- Affably Evil: Despite being a drug dealer and criminal, Mr. Walters is overall a pretty friendly guy.
- Ambiguously Gay: Frequently hit on Jenko nearly every time he saw him, and in the second film, he forces Eric to make him his prison wife.
- Big Bad: Of the first film. He created the H.F.S. by accident and is supplying the high school with it, causing a few casualties on the way.
- Boomerang Bigot: He tells lots of homophobic profanities and in the second film, he has sex with Eric.
- Eunuchs Are Evil: At the end of the first film, Mr. Walters' dick is shot off by Schmidt. In the second film, he becomes transsexual and uses Eric as his sex toy.
- Friendly Enemy: Surprisingly enough, he's become this to Jenko and Schmidt by the second movie despite the fact that Schmidt shot off his dick and even gives them a few tips in solving the WHY-PHY case.
- Large Ham: As expected from a character portrayed by Rob Riggle, he shouts a lot and chews the scenery.
- Amazingly Embarrassing Parents: They embrace every thing that Morton has done and are very proud of him. Also they place photos of him, even a traumatising picture that was taken when he was a child and naked that made him look like Fred Savage in The Wonder Years.
- Hypocritical Humor: Annie and David love to smoke marijuana, but Annie gets pissed when her son made a party with alcohol and marijuana too.
A group of nerds that Jenko befriends at the Advanced Chemistry lessons. They work for Jump Street after the events of the first films.
- Adorkable: Zack, who can't properly wink for inverse psychology tricks.
- Asian and Nerdy: Roman, who is also the Token Minority of the trio.
- Demoted to Extra: They only appear in the second film for a short amount of time, but it is shown that they work for Jump Street after the first film.
- Give Geeks a Chance: The nerds get some love at Schmidt's house party and in the prom night they come in a limo with Jenko's prostitute friends.
- The Leader: Zack is the de-facto leader of the trio.
- Took a Level in Badass: The trio work for Jump Street after the first film and get into some action when facing the Ghost.
Fugazy & Jr. Jr.
Two undercover agents from Jump Street.
- The Big Damn Kiss: Jenko gives one to Fugazy at the end of the film.
- The Cameo: Jr. Jr. makes a little appearance as a reinforcement along with the nerds in the second film against the Ghost.
- The Smurfette Principle: Both are the only female agents of the Jump Street program in the first film.
- Women Are Wiser: They seem to be much more competent than Schmidt and Jenko as they had already accomplished two operations whereas Schmidt and Jenko are still on their mission.
- What Happened to the Mouse?: Nothing is known about Fugazy's fate after the first film.
A high school student that Schmidt falls in love with and she is also Eric's girlfriend.
- Break the Cutie: Molly gets disappointed with Schmidt's behavior during the Peter Pan play and drugs herself with H.F.S. at the prom night.
- Damsel in Distress: She accidentally becomes an improvised hostage for and gets kidnapped by Mr. Walters in the film's climax.
- Love Interest: To Schmidt. They start to like each other and do fall in love. But by the second film, every trace of their relationship is completely removed and Schmidt has another romance interest.
- What Happened to the Mouse?: There's no mention of her character in the second film or why she broke with Schmidt.
Leader of the One-Percenter motorcycle gang that also deals with the H.F.S drug.
- Big Bad Duumvirate: Along with Mr. Walters, they both have a deal in distributing the H.F.S.
- Eyepatch of Power: He wears one after he is injured in the highway chase.
Domingo's number two in the One-Percenter gang.
- Beard of Evil: He looks like ZZ Top!! Packed with a shiny dome too.
- The Brute: The most physical imposing member of the gang, he tackles Schmidt in the park chase and hits the car when Schmidt accidentally hits his motorbike in the highway.
- The Dragon: The most prominent member of the gang and stands for Domingo every time.
Jenko's science teacher that takes a sexual interest on him.
- Adorkable: Whenever Jenko is around, she tends to trip over her words and fawn over him. Even in the middle of class.
- Hooked Up Afterwards: With Jenko in a post credit scene.
- Hot for Student: Quite noticeably for Jenko, even though he's actually undercover.
- Mrs. Robinson: Played With. Even though he's really an undercover cop, Ms. Griggs really doesn't seem to have much of a problem flirting with Jenko, even under the impression of him being a minor.
- Teacher/Student Romance: Ms. Griggs keeps flirting on Jenko during her lessons but it doesn't go any further. That is until the credits shows Jenko having sex with her.
A former Jump Street agent who now works in the police department's garage.
- The Cameo: Like Hanson and Penhall, she is one of the original series' protagonists that makes a special appearance.
Tom Hanson and Doug Penhall
Two former 21 Jump Street officers that work for the DEA undercover in the One-Percenters Motorcycle Gang.
- Back for the Dead: They are both killed by the One Percenters. This was an Enforced Trope by Johnny Depp, who hated his time on the TV show so much that he was only willing to return if they killed off his character.
- The Cameo: They appear briefly at the climax played by the same actors as in the series.
- Dropped a Bridge on Him: In the movie continuity, Penhall left Jump Street with Hanson and both later went to become DEA agents. They are shot by The One Percenters while Hanson is berating the recent members of Jump Street Chapel for blowing their cover.
- I Banged Your Mom: When his cover is blown, Hanson brags to Domingo that he banged his sister, whose wedding he played Saxophone at.
- It Amused Me: This exchange.Hanson: We had to get tattoos on our dicks man.
Penhall: Actually I said that just to mess with you.
Penhall: It looks tough.
A criminal that deals with the new WHYPHY drug who misses the good old days in the Nineties.
- Big Bad: He is the one behind the drug dealing of WHYPHY with the help of his daughter, Mercedes.
- Not Quite Dead: In the Credits Gag he turns out to have survived the grenade and appears in 24 Jump Street: Return of the Ghost.
A friend of the college student that died while consuming WHYPHY and falls in love with Schmidt. And she's also captain Dickson's daughter.
- Action Girl: Shows these traits during the climax, where she rescues Schmidt and arrests Mercedes.
- Daddy's Girl: Anyone who has had any physical contact with her will surely face her father's wrath.
- Damsel in Distress: Hilariously averted. Her father tells her to stay away in case she might get kidnapped, only to be her father the hostage.
- Love Interest: Schmidt falls in love and has sex with her in the second film, with very hilarious consequences.
Maya's roommate who has a dislike for Schmidt.
- Daddy's Little Villain: She is the daughter of the Ghost and distributes the WHYPHY through the college.
- Evil Counterpart: To Maya. They are roommates, with Maya being nicer and Mercedes much more rude, and also they have their own sexual tension with Schmidt. And each other are the daughters of Dickson and the Ghost respectively.
A student who desires to be a professional football player and gets into good terms with Jenko.
- Ambiguously Gay: At the end of the second film, he is tearfully happy saying that Jenko deserves to be with Schmidt.
- I Want My Beloved to Be Happy: A platonic sense with Jenko, but when he sees him happy with Schmidt, he doesn't get upset, instead being happy for Jenko saying that Schmidt is the guy he should be with.
- Lovable Jock: He's a football player and is a very Nice Guy. He's friendly to everyone he meets, always shows his support and concerns to Jenko, was the only one who vouched for Schmidt do to his loyalties to Jenko, and is happy that Jenko is with Schmidt. Really the worst thing he actually does is use WHYPHY once.
- Red Herring: Like Rooster, he is not the distributor but only a buyer.
Zook's best pal.
- Flat "What": Rooster's reaction to Zook being happy and sad at the same time to see Jenko and Schmidt together.
- Jerk Jock: Contrasting Zook's Lovable Jock, Rooster appears to be much more rude to people.
- Meaningful Name: Rooster sports a red crest.
- Red Herring: A very visual example. Jenko thinks that he is the WHYPHY distributor and when he asks about his tattoo, Rooster tells him that it's from his school team: the Red Herrings.
The Yang Brothers
Jenko and Schmidt's neighbor roommates.