Spoilers regarding The Reveal in the pilot episode are unmarked. Browse at your own risk.
The youngest daughter of Celia and Ham Mack, and Bex's younger sister... or so we all thought.
- Asian and Nerdy: Andi plays memorization games at dinner, made a song for solving rubik's cubes, and thought a historical landmark was a great idea for School Costume Day, among other things.
- Dangerous Thirteenth Birthday: She finds out that night that her "parents" are actually her grandparents and her "sister" is her biological mother.
- Foolish Sibling, Responsible Sibling: The smart, responsible sister to Bex's rebellious and carefree one. That is until The Reveal.
- Has Two Mommies: Celia raised her, but Bex is starting to take a motherly role in her life.Andi: Two moms, one house, and they agree zero percent of the time.
- It's All About Me: Andi's Fatal Flaw. This faw is usually worsened when things don't go her way or she feels people aren't listening or paying attention to her. She often fails to recognize that not everything is about her and doesn't usually consider other people's feelings or what may be going in their lives if they don't directly affect her.
- Jerk with a Heart of Gold: Downplayed. Andi isn't a bully, she can be selfish and inconsiderate at times and almost always wants things to go her way.
- Mundane Luxury: Since Celia is overprotective and strict, it doesn't occur to her that she could do anything beyond secretly having dessert after dinner, eating food in the living room, or skipping dinner entirely and going straight to the dessert when Celia and Ham go on a short vacation.
- Nice Girl: Andi is generally a well-mannered and friendly person.
- Poke the Poodle: Her idea of rule-breaking when her parents aren't around involves eating dinner in the living room while watching TV and having two deserts. Though given Celia's strictness, this probably would be treated as a serious infraction.
- Shipper on Deck: Andi really wants her parents to get back together.
- Tomboy and Girly Girl: The girly girl to Buffys tomboy.
- Wise Beyond Their Years: She proves herself to be this when caught in the middle of Bex and Celia's arguing and trying to get her to "pick a mother".Bex: She's so much smarter than we are.
Rebecca "Bex" Mack
The estranged daughter of Celia and Ham, and also Andi's older sister... which isn't quite the case.
- All Work vs. All Play: She's the play to Celia's work.
- Ambiguously Bi: The initial scenes between Bex and Miranda are played as if Bex is interested in and flirting with Miranda, and she is disappointed when Miranda's interest turns out to be in Bowie instead of her.
- Blithe Spirit: She rolls in on her motorcycle and shakes things up for straitlaced Celia's household through her free-spirited demeanor and secrets.
- Brilliant, but Lazy: She has some wise things to say, she's just irresponsible.
- Cool Big Sis: To Andi. Even before and after revealing their true relation, she's still more of this than a traditional mother, but it does edge into territory that seems rather motherly.
- Daddy's Girl: She and Ham have a very loving and affectionate relationship.
- Deadpan Snarker: See her reaction to learning that Andi has made an art project out of her old CDs:
- Foolish Sibling, Responsible Sibling: The rebellious and carefree sister to Andi's savvy and responsible one... until The Reveal.
- Missing Mom: Andi doesn't realize that Bex was this the whole time until The Reveal.
- Mixed Ancestry: White father and Chinese mother.
- Nice Girl: Can be irresponsible and snarky at times, but is overall an easy-going, helpful, and loving person.
- Only Known by Their Nickname: Everybody calls her Bex... except for Celia.
- O.O.C. Is Serious Business: You know things are bad when she starts acting like the responsible adult.
- Shipper on Deck: She thinks Andi's crush on Jonah is adorable and tries to help Andi get Jonah's attention.
- The Social Expert: She's really good at telling implicit clues from people
- Team Mom: Bex takes this role for Andi and her friends, even giving really important advice when need be.
- Teen Pregnancy: She and her boyfriend presumably had unprotected sex before they were done with high school, resulting in Andi. Do the math. She's clearly not a day above 30 by the series premiere.
- The Tell: She has a habit of offering to order pizza whenever she wants to Change the Uncomfortable Subject.
- Tomboy and Girly Girl: She is the laid-back adventurous tomboy to Celias uptight domestic girly girl.
- The Un-Favourite: To Celia. Bex feels that Celia prefers Andi over her to some extent.
One of Bex's boyfriends, and the biological father of Andi.
- Disappeared Dad: For whatever reason, it appears that the Macks have cut ties with him.
- Innocently Insensitive: His Fatal Flaw. He's spontaneous, so he usually does things without warning or asking for permission first. At first, it seems okay, with him showing up to the Mack household after Bex sent him a simple "Hey." (causing him to bond with her and Andi) and taking a recipe that was a signature of Celia's mother (causing Celia to let him stay for as long as he'd like), but he gets too nosy in Andi's life, causing her to tell him to Get Out! when she finds him going through her picture gallery on her computer, when he was actually creating a video montage of him, Andi, and Bex as a surprise gift.Bowie: Oh, I'm sorry if I overstepped any boundaries...
- Locked Out of the Loop: Bex never told him about Andi at all or that she was even pregnant with her, but Ham reveals that he told him about Andi when they came across each other on FacePage. Since Bex appears to still love him, it can be assumed that she didn't want to get him involved in the situation.
- Nice Guy: Like Bex, he's a sweet guy.
- Papa Wolf: He's absolutely livid when he finds out Miranda knew Morgan took Andi's bracelet, snuck it back in the Andi Shack, and then made Andi apologize to Morgan as part of some convoluted attempt to get Andi and Morgan to like each other. He immediately breaks up with Miranda for making him doubt Andi and for making Andi apologize for something her own daughter did.
- Promoted to Opening Titles: As of season 3.
- Trailers Always Spoil: Press reports on the show as well as images of the cast together on set reveal that he does appear in person at some point in Season 1 and does meet Andi.
- What the Hell, Hero?: He takes the final straw of Andi when she walks in on him going through her computer files, violating her personal privacy. She tells him to Get Out!.
Another one of Andi's friends, Buffy is confident and loves playing sports.
- Academic Athlete: The captain of the girls' basketball team and a star math student.
- Black Best Friend: To Andi and Cyrus, though she does get her own B-plots and story lines.
- Competition Freak: To the point where Buffy's track team is disqualified because she fails to pass the baton to her teammates during the relay.Cyrus: But winning isn't everything.
Buffy: Of course it is! That's why I like sports. You always know where you stand.
- She even treats chatting with a guy at a party as if it were a competition.
- TJ uses Buffy's need to feel as though she has the upper hand by constantly telling her "you're right" (per Cyrus' advice) to get favors out of her, such as doing his homework, and it works. She straight up falls for it.
- In "The Quacks", Buffy's new basketball team hasn't been playing well and she's been very critical of them up to this point. However, Buffy ultimately decides it's better to lose with dignity and have fun with her teammates, encouraging them, than it is to forfeit while failing to boost morale, which is a big moment for her.
- Deadpan Snarker: Even among a cast full of witty characters, Buffy stands out.Cyrus: I thought Iris was dumping me.Jonah: Nah, just giving you a few days of the silent treatment. It's like some kind of test. Amber invented it.Buffy: She's the next Steve Jobs...
- Expy: To Margaret Browning-Levesque, from Naturally, Sadie
- The Fashionista: The reason she didn't want to join the Ultimate Frisbee team is that she didn't like the uniform.
- Jerk Jock: She nears that edge every now and then.
- Jerk with a Heart of Gold: Buffy may sometimes be over-competitive and a bit aggressive but she still does care about her friends and is always willing to support them.
- Missing Mom: Buffy's mother is temporarily stationed overseas.
- Passionate Sports Girl: Buffy is a very aggressive and competitive athlete.
- Quirky Curls: Buffy gets written up at school for having big hair, and accidentally gives herself a bald spot trying to straighten it. While she says she likes her hair straight, she also loves her curls and won't change her hair just because it's what someone else wants her to do.
- Shout-Out: You know what it is. And she knows too, so don't bother saying it. Though she has watched the show and she's liking it so far.
- Tomboy and Girly Girl: She is the tomboy to Andis girly girl.
- Tomboy with a Girly Streak: Buffy is very fierce and competitive when it comes to sports, but she is shown on occasions to wear more feminine items of clothing such as skirts and hair bows and is not adverse to talking about crushes and romance.
Celia "Cece" Mack, née Chen
Andi's strict grandmother, who she thought was her mother.
- All Work vs. All Play: She's the work to Bex's play.
- Alliterative Name: Her maiden name, Celia Chen.
- Berserk Button: Please don't call her "grandma" or "granny" or any other name to imply she's old enough for her offspring to have offspring.
- Deadpan Snarker: Well, you can guess where Andi and Bex's dry humor come from.
- Defrosting Ice Queen: If the title introduction and promotional material mean anything, she's Not So Stoic and at least gets better with Bex to the point where they're happy enough with each other to be in the same photo.
- Education Mama: Gave Andi an unabridged history book about math for her thirteenth birthday. She also likes the naming-memorization games at the dinner table.
- Former Teen Rebel: After Andi finds a very skimpy bathing suit, Celia reveals that it belongs to her.Celia: I wasn't always serving muesli. Once upon a time I was known as "Cece".
- The Glorious War of Sisterly Rivalry: With her older sister Mei, which has carried on unabated for decades even though both are now middle-aged.
- I Have No Daughter: Says something like this to Bex in the pilot episode, though considering how distraught she already was and the stress of the situation, it's possible she didn't mean it.
- Happily Married: To Ham. He's the yang to her yin.
- Ice Queen: She's dismissive to Bex returning and attempting to re-integrate back into the family.
- Jerkass Has a Point: Since Bex has been absent for much of Andi's life and Bex had already taken a path in her adolescence that most parents hope their child never goes through as it usually results in the rest of their plans and hopes for their child being dashed, she has a point in wanting to make sure Andi grows up to be a smart, decisive, and responsible person. Bex admits to her that she has done a better job of taking care of Andi than Bex herself ever would, but also tells her that she doesn't have to let go of Andi and give her up completely to Bex, she just has to let Bex into Andi's life.
- My Beloved Smother: She's strict and overprotective of Andi, refusing to let her wear lip gloss, watch a horror movie, or even let her have a toaster tart for breakfast.
- "Not Important to This Episode" Camp: Lauren Tom missed a few episodes in the show's first season, the only person credited in the opening titles to do so. Notably, on one occasion, the actor who plays Celia's husband Ham (who isn't in the opening credits) appears but she does not.
- Not So Above It All: When a neighbor calls her "grandma" (also a Wham Line, as it means the secret got out), Celia sprays her with a garden hose and tells her to screw off before getting the heck out of there.
- Tomboy and Girly Girl: She is the uptight and domestic girly girl to Bexs laid-back and adventurous tomboy.
- Trademark Favorite Food: Muesli, the foundation of a nutritious breakfast (she doesn't allow Andi to eat anything else in the morning). She even complains when Bex brings home the wrong brand from the grocery store.
One of Andi's friends, Cyrus is an awkward, anxious, and supportive guy.
- Adorkable: Cyrus can be very awkward (although he is much more confident by Season 3), silly, clumsy and a bit of a nerd but very lovable. Definitely an adorable dork.
- Ambiguously Gay: He finds Jonah as equally worthy of worshiping as Andi does, maybe even more so. When set up by Jonah with Amber's friend Iris, Cyrus seems less concerned about going on a date with a girl who likes him and more enthused about getting to spend time with Jonah.
- As of Season 2, he is officially, canonically gay.
- Crazy-Prepared: In his role as the Official Fan of the Space Otters, he has preparations for any eventuality that might befall the team during their practices.
- The Confidant: Although all the characters confide in each other at one point or other, Cyrus, being the son of four therapists, is often the one his friends confide in and go to for advice (which is almost always that they need to get better at communication). He has a way of getting people he doesn't initially know very well to feel comfortable enough to open up to him, as seen with TJ and Amber. Cyrus often presses people to confront each other to talk and work through problems and feelings.
- Expy: He very strongly resembles David "Gordo" Gordon from Lizzie McGuire in a lot of ways. Like Gordo, he is Jewish and his parents are psychologists. He also takes pride in his "weirdness" and, in season 2, starts showing an interest in becoming a filmmaker. Like Gordo, he's also been pining for one of the show's other main characters pretty much from the get-go. The big difference is that Gordo was straight and pined for his female friend Lizzie; Cyrus is gay and is pining for his male friend Jonah.
- Gay Guy Seeks Popular Jock: Canonically initially felt this way towards Jonah, who is the captain of the ultimate frisbee team, and later on is implied to have a crush on TJ, who is captain of the basketball team.
- Heroic Self-Deprecation: Prone to this. It's often suggested that he has low self-esteem.Cyrus: You should see me when I'm really putting myself down. It's dark.
- Hopeless Suitor: He never really had a chance with Jonah, especially due to Jonah and Andi being in a relationship, and Jonah was oblivious to Cyrus' infatuation with him. Cyrus eventually moves on from Jonah as his feelings fade from romantic to platonic.
- Incompatible Orientation: The reason things couldn't work out with Iris - otherwise they were a good match and got along well.
- Last Het Romance: With Iris. Kissing her is implied to be what makes him certain he doesn't like girls.
- Morality Pet: For TJ, and later Amber
- Nice Jewish Boy: He's friendly, helpful, and brings up the fact that he's Jewish several times.
- Nice Job Breaking It, Hero!: Cyrus has a knack for this.
- Andi confided in him about her family secret, but then he tells his mom, who then spreads the news to the rest of the town.
- In trying to get the newly-single Jonah to confide whether or not he has feelings for Andi, the pep talk he gives accidentally convinces Jonah to reconcile with Amber instead. This is after he had talked Buffy into letting him handle things.
- Cyrus somewhat inadvertently tells TJ how to manipulate Buffy, which he uses to get her to do her homework and ultimately gets her kicked off the basketball team for helping him cheat.
- Plucky Comic Relief: His dialogue tends to be light-hearted and jokey, the better to defuse whatever tense situation he finds himself in. He also usually (though not always) has the comic subplots while other characters are dealing with more serious problems.
- Positive Friend Influence: His trusting nature and willingness to see the best in people has helped TJ and Amber through their Heel Face Turns.
- Sensitive Guy and Manly Man: He is the meek, nonathletic sensitive guy to TJ's basketball playing, hot-headed manly man. However, they tend to subvert these roles. Cyrus becomes more confident around and from hanging out with TJ, whereas TJ becomes more soft and open.
- Sickly Neurotic Geek: He complains that his blood sugar is too low (suggesting hypoglycemia and/or diabetes), mentions that he forgot his inhaler (suggesting asthma), and gets nauseous from motion sickness to the point of vomiting on a merry-go-round.
- Squee!: "It's Jonah Beck!"
- Twofer Token Minority: Gay and Jewish
- Younger Than He Looks: Not at first, but by the time Season 3 comes around, he has hit a rapid growth spurt (seemingly aging between scenes in certain Season 2 episodes) making it rather obvious that the actor has aged well past middle school (Joshua Rush is the oldest non-adult main cast member).
A popular jock, and Andi's on-off Love Interest.
- All Take and No Give: Andi's entire relationship with him is based on her doing whatever he asks and getting nothing in return - which she finally realizes once he refuses to join the dress code protest. Ironically, he is on the receiving end from his relationship with Amber.
- Berserk Button: He gets really defensive about the validity of Ultimate Frisbee being a real sport.
- In Season 3, this defensiveness has worn off.
- The Charmer: The means by which Jonah Beck always gets what he wants. Andi even admits it's hard to be around him and not find herself doing whatever he asks.
- Commitment Issues: As of Season 3, Jonah has dated Amber, Andi, and Libby. He also can't seem to stay single for more than an episode.
- Empty Fridge, Empty Life: Jonah doesn't order food when the others go out to eat at the Spoon because he can't afford it. Both Amber and Andi (via the Loose Canon texting app) have given him food for free.
- Even the Guys Want Him: He's Jonah Beck. Almost everyone has liked him at some point. Could classify as a Chick Magnet - Andi even describes Jonah as "always surrounded by girls," and there are several scenes to back that up. He's the reason Cyrus realizes he likes boys.
- The First Cut Is the Deepest: Jonah's relationship with Amber was forced and toxic, and she ended up cheating on him. As a result, Jonah has a lot of issues in his relationships, including a lack of communication, a reluctance to use labels or engage in boyfriend/girlfriend things, jealousy, and neediness.
- Full-Name Basis: Everyone refers to him by his full name for whatever reason.
- Homeless Hero: His family was evicted from their house after a poor investment on his father's behalf. They are currently living with relatives.
- Informed Poverty: We don't get to see much about Jonah's financial situation besides what he tells his friends and that he can't afford to eat at the Spoon.
- Innocently Insensitive:
- He's completely unaware of his All Take and No Give relationship with Andi, and the one time he was being outright insensitive he apologized to her.
- He could also be very oblivious to Cyrus, particularly early on. Obviously, he didn't even know Cyrus was gay so the thought that Cyrus liked him didn't even cross his mind, but he didn't realize quite the effect he had on Cyrus, who idolized him and was basing a lot of his self-worth on Jonah's opinion of him. Things like accidentally calling Cyrus "girly" or bailing on wearing matching jackets with him would send Cyrus into a fit of insecurity and panic or just really hurt him, which Jonah was completely oblivious to.
- It's All About Me: Admits that he wasn't paying attention to Andi and her protest because he was preoccupied with ultimate frisbee and his team photo.
- Lovable Jock: As mentioned below, he's a Nice Guy and a prominent member of the Frisbee team.
- Nervous Wreck: It's revealed in "Cyrus' Bash Mitzvah!" that he seems to suffer from some type of panic disorder, which in turn gives him anxiety about getting more panic attacks.
- Nice Guy: He's friendly to everyone. In many scenes he is shown greeting and interacting with the Living Prop characters before making his way over to the Good Hair Crew.
- No Social Skills: Surprisingly enough. Despite being very outgoing and well-liked, Jonah has trouble forming meaningful relationships with people. He may be friendly with everyone but he doesn't seem to have any actual friends - apart from his girlfriend Amber, and later the Good Hair Crew. He also has trouble with being open about his feelings
- Perpetual Smiler: At least at the beginning of the first season, consistent with his Nice Guy personality. He's revealed to be more of a Stepford Smiler as Amber's controlling nature over their relationship becomes more apparent.
- And then he has an anxiety attack at Cyrus' Bar Mitzvah.
- Totally Radical: Refers (or at least intended) to Cyrus as "gnarly". Even the other characters (well, Buffy at least) tease him for it.
Jefferson Middle School
The principal of Jefferson Middle School.
- Dean Bitterman: About the dress code, but the protest coerces him into relaxing about it.
- Last-Name Basis: His first name is unknown and everyone refers to him as Metcalf.
- Putting the "Pal" in Principal: Subverted. Metcalf says he's not a "scary principal", that he's approachable and hopes he and the students can be friends, but his attempts to be cool are not very successful. Metcalf has a tattoo sleeve and tries to relate to the kids, but it doesn't work. In fact, Metcalf having tattoos puts Buffy off ever wanting one.
- Reasonable Authority Figure: Can be this at times, like in "Cookie Monster". When Cyrus goes to report the gun situation Dr. Metcalf is already waiting for Cyrus along a police officer, he is quick to assure Cyrus that everyone is okay. Also, in "I Wanna Hold Your Wristband", he assures the kids that no one is better than anyone else.
- Only Friend: When Jonah tells Gus to text his friends to come help with the Space Otters fundraiser, it's revealed that Jonah is his only friend.
- Small Name, Big Ego: Gus thinks he was put in Group A because the people in Group A are better than the people in Group B, but Dr. Metcalf tells him he's wrong because the groups were assorted alphabetically.
- Smart People Wear Glasses: A hard-working Teacher's Pet who wears Nerd Glasses.
- The Stool Pigeon: In "Were We Ever?" he rats Bex out to Principal Metcalf that she organized the dress code protest.
- Teacher's Pet: Gus would do anything to impress Jonah, the captain of the Space Otters. He is the one to deliver the message to Buffy that she was in trouble and needed to go to the principal's office, implying he is close with Dr. Metcalf. He's also a total snitch. He tells Metcalf that Bex was responsible for organizing the dress code protest at school and calls Andi out for trying to give Group A's cookies to Group B in Metcalf's privilege experiment in which Group A were treated better than Group B.
A transfer student to Jefferson Middle School who likes basketball, but is very competitive.
- Foil: To Buffy, particularly Buffy prior to her character development. She's a competitive ace basketball player with a need to constantly one up everyone around her, sometimes at the expense of others. However, she is much more of a jerk and quite cruel in a way that Buffy never was. Buffy has always been supportive of Cyrus' sexuality and respected his closet, whereas Kira uses TJ's sexuality against him to manipulate him, implies there's something weird about wanting to do a costume with a boy, and insinuates she might out TJ or at least spread rumors about his sexuality. Buffy understands that somersaults are Cyrus and TJ's thing, but Kira mocks the "inside joke [no one] understands."
- Gaydar: Kira picks up on something going on between Cyrus and TJ immediately upon witnessing how they act around each other, which she later uses to her advantage.
- Jerkass: Kira undermines the rest of the basketball team and constantly brags about her abilities. She doesn't even apologize to Buffy. She also has a very controlling attitude towards TJ shortly after meeting him.
- Jerk Jock: A basketball player and is mean.
- Manipulative Bastard: She will do anything to get her way, including manipulating people. She's good at it too, knowing which buttons to press to corner people into doing what she wants.
- Meaningful Name: The name "Kira" is a Russian feminine variation of the name "Cyrus".
- New Transfer Student: When Buffy and Kira first meet, Kira claims to have transferred from Monroe to Jefferson three days ago.
- Passionate Sports Girl: She loves basketball, and can a bit too overconfident in her skills.
- Politically Incorrect Villain: Downplayed. Several of Kira actions in "Mount Rushmore or Less" were heavily implied to be homophobic as she takes a dig at TJ for wanting to do a duo costume with a boy instead of a girl, threateningly telling him to "have fun with that."
- Pride: Her biggest flaw. She always brags about how she's better at basketball than everyone else, causing her to be kicked from the team.
- Small Name, Big Ego: Kira clearly has an inflated image of herself.
Tall and cocky, he's either the fastest runner in school or the fastest boy, depending on who you ask. Buffy wants to make sure he can only claim the latter, but rivalry might not be the only thing they have with each other.
- The Bus Came Back: He returns in season 3.
- Competition Freak: Like Buffy, he can be highly competitive.
- In-Universe Nickname: Marty from the Party.
- Lovable Jock: Despite his cocky attitude, he's generally a nice guy.
- Only One Name: When he and Buffy first meet at Andi's party, he introduces himself as Marty. When they meet again at track practice, he reintroduces himself as "Marty From The Party", which seems to be what both he and Buffy go with when he needs to be referred to on a Full-Name Basis.
- Put on a Bus: Marty is spoken about, but not seen, during the second half of Season 2, as his actor left the show to play Oscar on General Hospital.
- He ends up returning in The Quacks.
- Satellite Character: His entire character arc revolves around Buffy. He doesn't even interact with anyone else until the last episode of the first season, when he talks to Cyrus (who is only there to officiate the race between him and Buffy).
- Second Place Is for Losers: Both he and Buffy take a one-on-one race very seriously. He's not thrilled about losing. Or Buffy's new nickname for him.
- They Call Me Mister Tibbs: As a joke, when Buffy addresses him as "Marty From The Party", he says his friends call him "Mr. The Party".
The captain of the basketball team, who has a learning disability, and quickly becomes good friends with Cyrus.
- Ambiguously Gay: It's very easy to read this in how he interacts with Cyrus - Cyrus the catalyst for almost every instance of TJ's character growth throughout the second season, they're very physically comfortable with each other, and while TJ's screen time is limited due to being a supporting character, the dialogue indicates they spend a lot of time together off-screen. TJ takes an interest in Cyrus almost immediately despite having been unpleasant to everyone else. TJ lights up whenever he's around or talking about Cyrus and thinks the absolute world of him, talking about him to his friends and admitting Cyrus is the "only person I can talk to like this." It's fair to say TJ very fond of Cyrus. Their actors do nothing to dissuade this interpretation of their relationship - quite the opposite, in fact.
- And then there's the... contentious issue of his ambiguous look back in the season two finale (although Joshua Rush seemingly confirmed that the look back was intended for Cyrus).
- After Season 3 Episode 11, "One in a Minyan", aired, Buffy and Andi via Andi's Texts (an official interactive texting game found on Disney NOW) discussed how they had taken notice of how "nice" he is to Cyrus when talking about crushes with an exchange of "Hmmmm."
- Kira seems to take notice of something going on between TJ and Cyrus and seemingly uses TJ's fears regarding his sexuality against him to manipulate him.
- Defrosting Ice King: Cyrus is the first and for a while, the only person to get past the mean, cold shell TJ has built up around himself. TJ defrosts almost immediately towards Cyrus, being nice to him and opening up about his insecurities, about the things he would never tell anyone else. TJ gradually defrosts towards the rest of the world in the latter part of Season 2 and genuinely wants to better himself, which Cyrus recognizes and encourages.Jonah: [TJ]'s mean, he's always been mean.Cyrus: Eh, that's just his face. He's really not so mean anymore.
- Disability as an Excuse for Jerkassery: TJs insecurities related to his learning disability make him lash out on people.
- Dumb Jock: Set up as this, but then subverted - he realises he actually has a learning disability. Theres also a few hints that hes actually pretty smart in other areas, for instance understanding a reference Buffy makes to Machiavelli, to her surprise.
- Foil: To Jonah. They're both green eyed team captains who seem confident but have issues and secrets and are more than meets the eye. The difference is that Jonah has always been extremely friendly, whereas TJ was cold and mean, but simultaneously, Jonah was, particularly early on, quite oblivious to Cyrus, whereas TJ has always gone out of his way to demonstrate that he cares about Cyrus and thinks he's important. Cyrus tries something new with Jonah and fails; with TJ, he succeeds. TJ is a "costume day guy"; Jonah is "not a costume guy."
- Friend to All Children: TJ works at a children's gym. The kids there love him, implying he's always been sweet to them.
- Hiding the Handicap: As he told Buffy, he would rather have [people] think hes stupid, than know about his dyscalculia.
- Heel Realization: The scene in which Buffy finds out Cyrus told TJ to tell her she's right to get favors out of her, thus breaking TJ's promise that she wouldn't find out and jeopardizing Cyrus and Buffy's friendship, right before Buffy gets suspended from the basketball team for doing TJ's homework is heavily implied to be the moment TJ realizes the consequences of his actions, the hurt he's caused. TJ looks extremely guilty and it's from this moment onward that his quest to become better and make things right is set in motion. He also progressively gets nicer with each appearance after this.
- Jerk Jock: Initally, he is not a pleasant guy.
- Becomes a Lovable Jock at the end of Season 2 and has been throughout Season 3.
- Kick Them While They're Down: After accidentally knocking over Buffy he insults her and refuses to help her back up
- "L" Is for "Dyslexia": He has a learning disability, Dyscalculia.
- Odd Friendship: Of all people, Cyrus is the first person we see him show genuine kindness towards, and right from their first interaction as well.
- Only Known by Initials: Everybody he has interacted with calls him TJ. It was revealed in the episode We Were Never that his last name is Kippen, but his full name is still unknown.
- Sensitive Guy and Manly Man: He is the hot-headed, basketball playing manly man to Cyruss meek, nonathletic sensitive guy. However, they tend to subvert these roles. Cyrus becomes more confident around and from hanging out with TJ, whereas TJ becomes more soft and open.
- Took a Level in Kindness: He started showing a nicer side of himself around Cyrus, which slowly becomes his general character towards everyone at the end of Season 2 when he genuinely feels bad for his behavior and wants to become better. This is also when apologizes to Buffy and offers to be friends. In Season 3, there's no question as to whether or not he's been reformed as he's a lovable if sarcastic sweetheart.
- Totally Radical: Gets a few of these, "niceberg" and saying "LOL" out loud the more memorable ones.
- Younger Than He Looks: He does not look like a middle schooler, unless he was held back.
A young woman who runs a small fashion shop in town. It turns out Bex used to babysit her and she hires Bex to work at the store.
- Asian Airhead: She's Asian and not quite the quickest mind around.
- Benevolent Boss: Probably due to the fact that Bex used to be her babysitter, so there's that. She doesn't even bat an eye when Bex needs to leave for a family emergency during her first week of work. She isn't even mad when she discovers that the "emergency" has evolved into Bex and Andi throwing a Wild Teen Party.
- Dumbass Has a Point: Of all people, she's the one who points out that Bex needs to tell Cyrus his movie script is terrible
- Nice Girl: A bit of an airhead, but a nice girl.
Henry Andrew "Ham" Mack
Andi's grandfather, who she thought was her father.
- Bumbling Dad: Averted - Ham might be the most sensible and level-headed character in the whole show, and certainly within the Mack family. It's easy to see where Andi gets her maturity from.
- Happily Married: To Celia. She's the yin to his yang.
- Reality Ensues: Frequently posting images on his social media page of him and his family eventually earned Bowie's attention when he found Ham on FacePage, who wondered if the Macks had another daughter or became grandparents. Ham believed that it was best that Bowie was aware that he is the father of a daughter with Bex rather than omitting this piece of information for an indeterminate amount of time, so he told him the truth.
- Only Known by Their Nickname: Like father, like daughter. Even Celia doesn't refer to Ham by his proper name. "Ham" is actually an acronym of his full name, Henry Andrew Mack.
- Reasonable Authority Figure: Since Celia is playing Ice Queen, he's playing the mediator between her and Bex whenever possible.
- Un-person: When Stoney Westmoreland was arrested, all unaired episodes had any scenes with Ham removed, as well as Westmoreland being fired from any and all future episodes, basically turning his character into this.
- What the Hell, Hero?: He and Bex decide that sending Bowie an email about recent events would be good idea. Problem is, how exactly do you begin to drop a bomb on a guy you cut off ties with years ago? Certainly not "Hey.", which is what Bex sends to him, causing Ham to give her this... and he's not much better with "Bowie, hey."
- Bitch in Sheep's Clothing: Miranda is shown to be nice at first, especially around Bowie, but she reveals her true colors in "Crime Scene: Andi Shack!" and "Bought, Lost, or Stolen".
- Hate Sink: Unlike the kid antagonists such as TJ and Amber, Miranda does not get a redemption arc and is really only there to cause drama in the Mack family with no signs of improvement.
- Jerkass: She is incredibly mean and fake.
- Jerk with a Heart of Jerk: She returns in Season 3's The Ex Factor. She apologizes to Bowie, thanks him for his advice on parenting, and informs him that she has a new boyfriend, then proceeds to show no growth from her previous appearance and make unreciprocated advances on Bowie.
- Manipulative Bastard: She returned Andi's stolen bracelet to Andi Shack after her daughter took it, then proceeded to blame Andi for falsely accusing her daughter of theft.
- Pushover Parents: She is clearly this, seeing as how she lets Morgan get away with everything.
- Your Cheating Heart: A downplayed example, but she flirts with Bowie, knowing that neither of them are single.
A high-schooler a grade or two higher than Andi and her friends. She's Jonah Beck's girlfriend.
- Alpha Bitch: She's a popular student dating a younger boy and doesn't like it when someone/something gets in the way of what she wants.
- In Season 2, however, she seems to expand her emotions towards a friendlier attitude.
- Beware the Quiet Ones: She doesn't talk as much as the other characters, which only helps to make her more intimidating.
- Clingy Jealous Girl: Anytime Andi and/or Jonah are involved (which is pretty much every scene she's in), she does something to make Andi fall out of favor or make it clear to her that it's her territory.
- Death Glare: Gives a Kubrick Stare to people she doesn't like, usually Andi, which results in a staring contest at one point. Bex receives some glares a couple of times.
- Hypocrite: Amber convinces Andi to distance herself from Buffy for dating Walker as it's a violation of the first rule of girl code: don't date someone your friend has dated. Amber insists on it, which is why it's hypocritical that she starts dating Jonah again after Andi dated him considering that they're now friends.
- I Just Want Friends: Around the time in Season 2 Amber starts being nicer, she reveals to Bex that she doesn't have any friends. It's unclear what happened to Iris, or if she means close friends since she seems to have at least casual friends in Season 3 when she and Andi go to a party.
- Kick the Dog: Happens quite a bit. In the party episode, seeing that everyone is having fun with Andi, she makes an announcement to seemingly cheer on Andi and her new cool mom Bex... and then follows it up by tauntingly and pseudo-innocently asking where the father is, going for a slut-shaming reaction from the audience. She's quite proud of herself when Andi flees the scene and claims she was just asking when Jonah confronts her for asking such as thing.
- Manipulative Bastard: She keeps Jonah wrapped around her finger by subtly and skillfully manipulating him. For example, she takes his phone and texts Andi to trick her into thinking Jonah wants to talk to her - while at the same time convincing Jonah that Andi has feelings for him. You can also see the gears in her mind shifting as she tries to figure out how to best take advantage of Andi ending her friendship with him.
- Odd Friendship:
- Amber eventually starts hanging out and becoming friends with Andi despite their initial rivalry. Many fans see Amber and Andi's friendship as a Romantic Two-Girl Friendship.
- Cyrus and Amber also become friends after Amber stumbles into him after a therapy session with Cyrus' step-mother.
- Only One Name: Her last name is unknown.
- Pet the Dog: Maybe. She lets Cyrus know her friend, Iris, thinks he's cute and gets them together. Jonah, Cyrus, and Iris go on a double date. However, she mocks Cyrus' shoes when they're on the date.
- She seems to show some concern for Cyrus on the carousel ride when he gets dizzy and screams for it to stop.
- Redemption Quest: She quite literally says she doesn't want to be the mean girl anymore.
- The Social Expert: One of the more "evil" examples, and how she's able to pull off her manipulative bastardry, since her boyfriend has No Social Skills. She (correctly) intuits that Andi has a huge crush on Jonah, how Andi's father being a mystery is a sensitive issue for her, and provides this all-important nugget of wisdom: "If (s)he turns to look back at you, it means (s)he likes you. And not just as a friend." Jonah then turns to look back at Andi, and then Andi and Cyrus both turn to look back at Jonah.
- You Keep Using That Word: In-universe. She says "Amber Alert" to look cute, then Andi points out to her that it's not cute at all since it's used to alert people about kidnapped children.
- Your Cheating Heart: At the end of "It's Not About You", Andi sees Amber cheating on Jonah with another boy. Unfortunately, the problem of the next episode is that Jonah is too convinced that Amber is innocent and doesn't understand why Andi would lie to him about such a serious matter.
- What Happened to the Mouse?: Jonah and Amber later break up for reasons which are ultimately never revealed, then reconcile thanks to Cyrus' meddling, and then break up again at least in part because of Jonah's feelings for Andi - meaning Amber's infidelity was completely irrelevant to the whole situation.
Amber's friend, who Cyrus briefly dated before realizing he's gay.
- Adorkable: Much like Cyrus.
- Birds of a Feather: Cyrus and Iris are extremely similar. They have the same interests, same sense of humor and temperament, and their names rhyme. They even look similar.
- There's a line in "Mama" in which Cyrus mentions to Jonah that he's met his Doppelgänger. Fans like to joke that he was referring to Iris.
- Dandere: Iris is shy around new people. Despite being high school aged, she is nervous when she first meets Cyrus' middle school friends.
- Last Het Romance: For Cyrus. Cyrus' crush on Jonah and a "terrible" kiss with Iris lead him to the realization that he's gay.
- Masculine Girl, Feminine Boy: A mild example. When Cyrus fails to win a stuffed animal for her on their date, Iris wins one for both of them.
- Nice Girl: Is nothing but kind and sweet from the moment she shows up onscreen.
- Odd Friendship: Who'd have thought Amber would be friends with a funny Nice Girl?
- Put on a Bus: She disappears after she and Cyrus break up, although their break up is amicable.
Jonah's (brief) girlfriend, who is deaf.
- Commonality Connection: Libby's friendship with Andi stems from their shared love of arts and crafts.
- Disabled Character, Disabled Actor: Libby is played by Millicent Simmonds, a deaf actress.
- Disabled Love Interest: To Jonah.
- Hair of Gold, Heart of Gold: Libby has blonde hair and is a very nice person.
- Ice Queen: Subverted. Andi initially thought that Libby didn't speak to her because she hated her. As it turns out, she's not so cold and distant. She didn't reply to Andi because she couldn't hear her.
- Nice Girl: She's very friendly, and is able to immediately form connections with Andi and her friends.
- Offscreen Breakup: It was revealed that she broke up with Jonah in the mid-season 3 finale.
- The Speechless: Being deaf, she prefers to not speak.
- Bitch in Sheep's Clothing: At first, she comes off as an anti-social but sweet kid. But then she steals Andi's Tibetan prayer box.
- Bratty Half-Pint: Morgan is stubborn, judgmental, and unappreciative.
- Creepy Child: Comes off as this due to her habit of stealing things and her anti-social behavior.
- Enfant Terrible: She's only a child but she likes stealing things and is very rude.
- Jerkass: Like her mother, she is rude and manipulative.
- No Social Skills: She has trouble connecting with Andi.
- Sticky Fingers: Has a habit of stealing things.
- Troubling Unchildlike Behavior: Morgan is an anti-social Bratty Half-Pint who likes to steal things.
One of TJ's friends, who likes playing with guns.
- Fearless Fool: He is adventurous and makes dangerous decisions without thinking about the consequences, such as bringing a gun with the intent to shoot some watermelons.
- Gun Nut: Reed stole his father's gun to play with it.
- Nice Guy: He presents himself as this to Cyrus, being pretty friendly with him. Things take a bad turn when he tries to convince Cyrus to use a gun, though.
- One-Shot Character: His only appearance was in "Cookie Monster".
- Toxic Friend Influence: To Cyrus, trying to pressure him into doing dangerous things such as using a gun. Reed eventually gets punished for this and has to do community service, however, as stated in "Cookie Monster".
A caricature artist who Andi meets at Cyrus' bar mitzvah.
- Child Prodigy: He's around the same age as Andi and her friends, but is a good enough artist to have his own public display.
- Drop-In Character: It's frequently lampshaded that he tends to show up unexpectedly
- Nice Guy: From what we've seen so far, he's a very pleasant, polite, and responsible guy.
- Official Couple: As of season 3, he is now dating Buffy.
- As of "The Quacks", they have broken up.
- The Promposal: Attempts to pull off an elaborate one for Buffy. Unfortunately, she declines.
- Put on a Bus: Walker is nowhere to be seen during the later half of season 3.