Their friendship has a tendency of being quite temperamental, but has stuck through for most of Season One and parts of Season Two through the Cheerios. In season three, the girls remained close friends, even Santana is saying that they "started together, ended together" with Brittany and Quinn agreeing, in the episode Nationals. They also reunite and sing together in the episode Thanksgiving.
character of the three of them. Although Brittany and Santana are initially introduced as supporting characters, each eventually takes on their own distinctive personalities. The girls join New Directions in Showmance, on Quinn's insistence, for keeping a close eye on Finn and all three perform I Say a Little Prayer. The trio falls apart when Quinn is kicked off the Cheerios, and Santana sees her chance to become the most popular girl in school. This began an ongoing rivalry between Quinn and Santana that continued through season two; Meanwhile, Brittany and Santana continued a 'friends with benefits' relationship and later developed feelings for each other. The trio eventually rekindled their friendship in the finale of season two, New York, when Santana and Brittany console a heart-broken Quinn, and accompany her to get a haircut. Backstage before performing In Chicago at nationals, they reaffirm their friendship when Santana says: "The Unholy Trinity, start together, end together" in the episode Nationals. After Goodbye, they separated, Quinn going to the Yale University located in New Haven, Connecticut; Santana to Louisville, Kentucky; and Brittany staying in Ohio. Brittany and Santana tried to stay together but it didn´t work out and stayed friends.Both are still close friends to Quinn. In I Do, Santana and Quinn had sex.
Quinn, Santana and the other Cheerios, laugh at a video that Rachel had posted on MySpace. Later in the episode, Quinn and Santana are walking together in the school hallways, and then Quinn stops to talk to Finn to ask him why he's talking with Rachel. In the end of the episode, Santana, Quinn and Sue watch the glee club perform Don't Stop Believin' (Brittany was not in the Pilot episode).
The three girls sit next to each other during the meeting of The Celibacy Club. They sit together around Sue, when the New Directions perform Push It. Later, Quinn, Santana, and Brittany audition for the glee club, because Quinn is worried about losing Finn. They perform I Say a Little Prayer, Quinn being the main vocal and Santana and Brittany as backup vocals. After that, they are together in Sue's office and Sue asks them to spy on the glee club for her.
They are shown trying to bring New Directions down, by encouraging Mercedes to go out with Kurt, despite knowing about his sexual orientation. Additionally, they convince the other members of the glee club to hire a professional dance coach, Dakota Stanley, a coach, who even made the members of Vocal Adrenaline cry. Brittany, Santana and Quinn stand or sit next to each other in several scenes. All three of them are seen washing cars together at the Glee choreographer car wash fundraiser, while Quinn and Santana are seen splashing each other and laughing. When Dakota Stanley criticizes the glee club, they are the only ones he doesn't have a problem with and tells them they're perfect and to stay just the way they are.
The trio sit close to each other, while April performs Maybe This Time in Glee club. Later, Brittany gives Santana a shoulder massage in the choir room when they learn that Quinn is pregnant.
They are close to each other in some scenes in the Choir Room. The three girls report details on New Directions to Sue. They dance together in Halo/Walking on Sunshine. Santana and Brittany weren't together for one scene since Brittany had a fill in.
They are the only ones at the Cheerios practice because the other girls are academically ineligible after flunking Will's Spanish class. Quinn performs You Keep Me Hangin' On along with Santana, Brittany and other Cheerios.
Quinn sits with Santana and Brittany in the library. While Santana and Brittany deface a yearbook, Quinn looks left out and says that she misses being a Cheerio and talks about wanting to be in the Cheerios squad's yearbook picture.
Mercedes mentions that Quinn has 'beef' with Santana and Brittany while talking to Will. Quinn puts Santana and Brittany as second and fourth respectively on the Glist.
The trio practice their vocals together while leaning on the piano, looking rather bored. They are all on Rachel's list of Glee Club members who "are not pulling their weight".
During the opening, they are together by the lockers while Jacob interviews them. They are dancing together while the Glee club is performing Empire State of Mind. Later, Sue calls Santana to her office and tells her that "a little bird" said that Santana has had a boob job. Right after that, she fights with Quinn in the hallways, which probably means that Santana only told Quinn, and obviously Brittany, about it. While they were fighting, Brittany unsuccessfully asks them to "stop the violence". At the end of the episode, Quinn sees Santana in the bottom of the pyramid and seems to feel bad for her.
They sit together in the choir room. In addition, at the beginning of Toxic, they dance together and each have a solo in this song, with Brittany getting the majority of lines.
In the first Choir Room scene, they are chatting together before Mr Schue starts talking and then sit together. While Santana and Mercedes perform River Deep, Mountain High, Quinn happily watches their performance, while Brittany bites her nails.
The trio, together with the rest of the New Directions girls, perform Start Me Up/Livin' On a Prayer. Quinn is partnered with Brittany, while Santana is partnered with Tina. They also sit together during their costume rehearsals and when Will announces that Coach Beiste quit.
The trio sing backup vocals in Forget You, and are constantly shown dancing together throughout the performance. They also sit together as a group in most of the Choir Room scenes.
They are first seen dancing together in California Gurls, then later, when they are being told by Sue that they're not good enough and they need to up their performance. They are also seen cheerleading during the football game. Later on, the trio are seen outside with Sue, who is unveiling the new cannon which she will shoot Brittany out of. Brittany worries that she will die, but Quinn assures her that she will tell Will and get him to stop it. Sue then tells them that they have to choose between Glee club and Cheerios. At first, they quit Glee club but are convinced by Finn to return at the end of the episode.
While Rachel and Finn are talking, the Unholy Trinity can be seen sitting together at a table looking at a menu. When Quinn is sad about Finn breaking up with her, Santana and Brittany console her. It is implied that Quinn also knows that Santana sometimes has sex with Brittany, and is okay with it. This is shown when Santana says, "I think I know how to make you feel better." and Quinn replies, "I'm flattered, Santana, but I'm not really that into that." Both, Brittany and Santana, accompany her to get a hair cut. They are also seen dancing together in a triangle during Light Up the World. Quinn assists Sam and Mike in holding back Santana when she tries to attack Rachel while yelling at her angrily in Spanish. Brittany watches the scene looking very shocked with most of the other Glee members.
Santana and Brittany try to persuade a new-look Quinn to rejoin Glee club and the Cheerios after she quit. Brittany states that they used to be "like the Three Musketeers", and that they all slept with Puck and joined the Cheerios the same year. Brittany and Santana admit to missing Quinn in their trio and openly express their wanting of her to be their friend again. Quinn, however, rejects their offer.
In Run the World (Girls), Brittany has a solo and Santana sings as back-up while Quinn doesn't sing, though during the number, the Unholy Trinity is seen dancing alone while all the other girls are lying on the floor. During Spotlight, Quinn and Santana can be seen talking with each other, while Brittany is doing back-up vocals (along with Tina) for Mercedes.
Along with Tina, the three of them share their experiences and their first times of having sex with Rachel. They all agree that it's a bad idea for Rachel to have sex with Finn.
During this episode, Quinn and Santana both vote for Brittany during the elections (Quinn states she's voting for her only because she's the only one who's a girl). Both, Quinn and Brittany, stand up for Santana, when the captain of the rugby team torments her. Later they dance together in I Kissed a Girl (Brittany and Quinn are seen close while they're dancing and then Quinn is seen hugging Santana.
After Sectionals, Quinn goes to the girls bathroom, and she talks with Santana and Brittany. She tells them that she loves them, and she wants them to rejoin New Directions. Later, during We Are Young, they sing together and at one point, Quinn walks up to Santana while singing her solo.
During Quinn's solo of Never Can Say Goodbye, we see inside her locker which has a picture of all of the New Directions Girls, including Santana and Brittany. She also has pictures of them during Rocky Horror. After that, Brittany and Santana hug her after the performance. Santana is the first person to go up and hug Quinn. Santana and Brittany also enthusiastically congratulate Quinn on her Yale acceptance and look delighted for her.
Quinn and Santana sit together during the performance of The Warblers. Also, they have a little interaction during the Glad You Came performance. After Regionals, the trio are invited to Rachel's wedding. When they're waiting for Quinn's arrival, Santana says to Rachel that Quinn's not coming.
Brittany performs I Wanna Dance with Somebody (Who Loves Me) with Santana and unsuccessfully tries to dance with Quinn. After the performance, Brittany says to Quinn that she is still dancing (and flying and breathing fire) in her dreams. In the girls bathroom, Brittany and Santana, along with the other girls, comment on the chemistry between Quinn and Joe.
Brittany is in charge of the Prom because she is senior class president and she puts Santana and Quinn in charge of counting the prom court votes. All three of them are nominated for Senior Prom Court, Santana and Quinn for Prom Queen and Brittany for Prom King
Before the New Directions go onto the stage to perform at Nationals, The Unholy Trinity form a circle to cheer for themselves in private, saying that they began their school career together and that they will also end it together. "Start together, end together," Santana says, with Brittany and Quinn agreeing.
They sit together on and around the piano during Will's performance of Forever Young. They smile to each other and share emotional looks, Santana and Quinn hold hands. Their friendship is clearly very strong. At Santana and Quinn's graduation, Brittany attends and she hugs both of them and fans Quinn before they go up onto the stage to collect their diplomas.
The Unholy Trinity are seen talking to the New Directions Girls about how in sync they were and how they were all beautiful and popular during their time at McKinley. Quinn also explains that they knew which way they were going to move by Santana's upper lip indicating the sensibility among them. They perform Come See About Me with Quinn as the lead, and Brittany and Santana singing back-up, which all of the New Directions Girls enjoy. The dance moves are similar to the ones in I Say a Little Prayer, their first song together and audition song for New Directions. Quinn and Santana later fight, as Quinn refuses to believe Santana about Kitty's cruelty, and accuses her of being jealous of her. They both slap each other, and as in all fights between Quinn and Santana, Brittany comes in and they both stop immediately.
Santana: Quinn?! Quit hoggin' the bathroom, I needs to re-pencil my eyebrows on.
Quinn: There, it's all yours.
Santana: Everybody's already in the other room working.
Quinn: Oh yeah? Is Mr. Schue in there, 'cause I think I'm gonna tell him that Rachel and Kurt keep sneaking off.
Brittany: You can't do that, he'll have to suspend them.
Quinn: And then there goes our chances at Nationals, darn!
Santana: You know what,we get it, you're pissed about Finn dumping your sweet ass, get over it!
Quinn: I don't wanna get over it, okay!
Santana: The only person that you're sabotaging here is yourself.
Quinn: I don't care about some stupid show choir competition.
Santana: Well you should because this is the one chance that we have to actually feel good about ourselves.
Quinn: Aren't we supposed to be the popular girls? So we can't we have our dreams come true? She has love, Tina has it, and even Zizes hooks up. I just want somebody to love me.
Santana: I think I know how to make you feel better.
Quinn: I'm flattered Santana but I'm really not that into that.
Santana: No, no I'm not talking about that, I'm talking about a haircut.
Santana: Quinn, look, this is our senior year. And frankly, being on the Cheerios isn't the same without you.
Quinn: You guys are such suckers for going back to Sue Sylvester.
Santana: Come on, screw her. This is for us. We can win two National championships this year. We joined Cheerios together, we joined Glee club together, we all slept with Puckerman the same year. We're like besties for life.
Brittany: Yeah, come on, Quinn. We used to be the Three Musketeers. Now Santana and I are like Almond Joy and you're like a Jolly Rancher that fell in the ashtray.
Quinn: You guys never understood the pressure I was under. It sucked. I'm not interested in the boys, or the makeup, or the polyester outfits.
Santana: Look, I've got a bar of soap and a bottle of peroxide with your name on it in my locker. Come on, Quinn. You can't break up the Unholy Trinity.
Quinn: People grow apart. Deal with it. I've got new friends now, and they accept me for who I am.
As of Season Three, they are seem to be good friends with Rachel Berry. Brittany and Rachel start in The Purple Piano Project in which they dance together in We Got the Beat. Santana and Rachel in I Kissed a Girl and Heart, in which Rachel is happy that Santana tells her family that she loves Brittany and when Santana is happy that Finn and Rachel are getting married. And Quinn and Rachel start with Hold on to Sixteen when Rachel asks if they are "kind of" friends and Quinn nods and agrees "kind of". They are all Bridesmaids in Rachel and Finn's Wedding, in which Quinn gets in a car crash because of her texting.
They have all dated/gone on a date with Finn Hudson and Sam Evans.
All three initially disliked Rachel, but all seem to be on good terms with her.
They have a two-sided love (Santana/Brittany), but have never been in an intimate, knowing relationship with Quinn.
Although Quinn is known as a Christian, she never has issues with Santana and Brittany's relationship or their sexuality shown in New York. Quinn also appears to support the LGBT community, and believes being gay is not a choice, as stated in I Kissed a Girl.
Are now officially known as the Unholy Trinity as of The Purple Piano Project, when Santana used the term.
Santana has the most solos out of the three of them, with 13, but only eleven were aired, while Brittany has eight, seven of which were aired, and Quinn has six solos. As far as duets Santana has the most out of the three, with 14, then Brittany and Quinn tie with eight duets each.
All wore Rachel's outfit, which they thought was Brittany's idea.
Despite the fact that they didn't seem to be friends anymore Santana and Brittany still comforted Quinn when she was hysterical over her break-up with Finn. After this encounter they seemed to have rekindled their friendship.
Both Quinn (seen in The Purple Piano Project and I Am Unicorn) and Santana (stated in Funeral) smoke cigarettes/cigars. (Though Quinn could have quit after leaving The Skanks.)
Both Quinn and Santana voted Brittany for Senior Class President (seen in I Kissed a Girl).
Quinn, Brittany and Santana after Say A Little Prayer
All of them, at some point, wanted to quit New Directions and join the Troubletones for different reasons. (Quinn wants to be closer to Beth, Santana wants to shine and to be seen as a star, and Brittany follows Santana's wish to her leprechaun, Rory). However, only Santana and Brittany were allowed by Shelby to join the Troubletones.
All of three them had different relationships with Finn. (Quinn had a romantic one, Santana had a sexual one, and Brittany had a friendship one).
In The Purple Piano Project, Santana said that they will win two National championships in their senior year but Quinn didn't care about it. While in On My Way, Quinn said to Sue that she will win the National championship in the Cheerios' uniform. Quinn may have changed her mind about winning in Nationals.
All of them had a private date at Breadstix (Quinn and Sam in Duets, and Brittany and Santana in Pot O' Gold). Coincidentally, it happened during the fourth episode of the second and third season, respectively.
Since On My Way, the trio are in the Cheerios together for the first time in Season Three.
Both Quinn and Santana ran for Junior Prom Queen (as seen in Prom Queen).
Also, both Quinn and Santana cried after losing from being Prom Queen and accompanied by someone. (Rachel for Quinn and Brittany for Santana)
All three were nominated for Senior Prom Court (Santana and Quinn for Prom Queen; Brittany for Prom King). (Prom-asaurus)
Dianna, Naya and Heather are great friends in real life.
Brittany likes dancing with Santana but felt bad for Quinn when she was in her wheelchair. She said Quinn could still walk in her dreams, she could also fly and breath fire.
They all have different sexual orientation: Quinn is heterosexual, Brittany is bisexual and Santana is homosexual.
All became a Head Cheerio. (Quinn in Seasons 1 and 2 and off screen in her Freshman year, Santana in Season 1 after Quinn was kicked off, and co-head with Becky in Season 3 and Brittany in Season 4.)
All have lost the Position of Head Cheerio once. (Quinn in Season 1 whe she was kicked off, Santana in Season 2 when Quinn came back and Brittany in Season 4 when she was kicked off)
They all had hair changes. (Quinn cut hers, Santana grew hers out and got bangs, and Brittany got bangs and then got rid of them)
They all have been shown on the cover of a magazine at some point on the show in their lockers. (Source)
At first, Quinn and Santana were shown as best friends, but later on Brittany, Quinn and Santana became best friends.
Quinn seems to have known about Brittany and Santana's secret relationship before anyone else. (New York)
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