Brooke Davis is shown to be a rich, popular, outgoing, and promiscuous head cheerleader at Tree Hill High. She first appears in 1x02, as Peyton Sawyer's (Hilarie Burton) best friend since the latter's mom death when they were nine. Initially, her crazy antics are responsible for a lot of comic relief in the show.
She takes a liking to Lucas Scott (Chad Michael Murray), and starts hitting on him in her usual way. Lucas takes it in his stride, and does not feel that Brooke wants to be in a relationship with him. One night, after Peyton is drugged at a party, Brooke calls Lucas for help. And while caring for a drugged-out Peyton, Lucas sees a whole new side of Brooke; he realizes that she may seem judgemental and unkind, but there is a whole different side to Brooke Davis. A side where she is compassionate and understanding. That night, Lucas and Brooke form a strong bond and eventually start dating. But halfway into the new relationship, Lucas realizes that his feelings for Peyton are too strong to be ignored anymore, and vice versa and the two start a secret affair. However, Brooke soon finds out, much to her anger and heartbreak. Furious and betrayed, Brooke ends her relationships with both of them; Peyton feeling guilty about betraying her best friend breaks up with Lucas; however this does nothing to soothe Brooke who feels that she was totally and utterly betrayed by Peyton. Brooke later said to Peyton before the prom; “You don't get it, do you?” It's not even about Lucas, it's about you'. Brooke and Lucas also had a pregnancy scare following their break up. Lucas said he would be there for her but she rejected him. During an argument she receives the results. She then lies and pretends to be pregnant when it turns out she isn't to punish him for cheating on her with her best friend, Peyton. Later she tells Peyton that she was lying, and in doing so, achieves her goal because Peyton is as pleased as she is that they can continue their relationship. Towards the end of the season, when Lucas also hurt Peyton by hooking up with Nicki, a woman (who he had met at a bar) who turned out to be Jake Jagielski's ex and Jenny's mother, Brooke decided to try and make things better with Peyton. She approached her at the beach party and said; “I love you P.Sawyer”, before Peyton replied, “I love you too, B.Davis”.
In the beginning of the second season, Brooke suffers a radical change as her family suffers a financial problem. They get to keep the house but most of the possessions inside of it, they have to sell. This affects Brooke because she was known as the rich girl and the party girl but now she might not be able to be either. Sparks fly between Brooke and Felix, and after some initial flirtation, the two initially start having a "friends with Benefits" relationship, which is a relationship purely based on sex. But Felix eventually wants to take things further, and even though she fears he could break her heart, she agrees to start dating. Later, Mouth tells Brooke that he is in love with her too, but she thinks of him as a 'little brother' and continues to date Felix. A drunk and disappointed Mouth smashes Brooke's windshield. Thinking that Felix did it, Brooke breaks up with him briefly. Lucas, meanwhile, also wants to be her boyfriend, but when he goes to tell this to her, he sees Brooke and Felix together: Felix has convinced her that his feelings are true.
Brooke then decides to run for Student Council President, against students who are much more studious, hard working and experienced than her. Brooke doesn't back down even in the face of dirty politics by one Erica Marsh (Katherine Bailess), and wins the post of Student Council President after Mouth delivers a touching recommendation speech to a packed auditorium for her. She quickly befriends Mouth once again, as well as Erica, who she feels sorry for, as Erica it turns out doesn't have any friends. Then, Brooke finds out that her parents are moving to California as her father has got a new job. Brooke is shocked when she finds out the surprise Lucas has in store for her: Karen has convinced Brooke's parents to let her stay with her, in Lucas' room, until the summer, since Lucas is living with Dan. Not only that, but Lucas has already arranged all her stuff in his room. Brooke also finds out that it was Felix who spray-painted the word 'DYKE' on Peyton's locker and immediately breaks up with him. Peyton fights back though, by writing 'DYKE' on her t-shirt to show everyone she can handle it and is told to remove the shirt at once. He is also kicked out of Tree Hill High as a result of his actions and his family sends him to military school. At last, summer arrives, and as Brooke is about to leave for California, Lucas finally confesses his true feelings to her.
Brooke at the start of school party.As the 3rd Season begins, Brooke realizes that deep down; she has had feelings for Lucas since she first met him. But, she still remembers how ugly things turned and is afraid of getting hurt again. She decides that they can date, but non-exclusively. However, there's a small problem: Lucas refuses to date other girls. So Brooke introduces a 'Fantasy Boy Draft' and accidentally sets him up with Rachel Gatina (Danneel Harris), a new cheerleader whom she's jealous of. The two butt heads and fight for the affections of Lucas, even getting into a catfight while cheerleading. But despite Rachel's attempts, Lucas turns her down and says that he still loves Brooke. Brooke, however, thinking that she may have lost her opportunity to be with Lucas, gets drunk and sleeps with Chris Keller, worse still, Lucas walks in on them. Realizing that if she had just come out with her feelings and told Lucas that she loves him then everything would have been fine. So she gives him the 82 letters that she had written to him but didn't send. Lucas forgives her and they get together.
Brooke in the Season 3/4 creditsShe also develops a clothing line Clothes Over Bros, and also makes Haley's wedding dress. However when Peyton reveals to Brooke that she has feelings for Lucas, bringing back the 'triangle', Brooke is enraged once again, and promptly ends her friendship with a teary-eyed Peyton. At the wedding things have not lightened up and it is clear for everyone to see and especially Lucas, that Brooke is very upset, especially with Peyton. Brooke tells him to not hang around or speak to Peyton. When Lucas and Brooke are dancing together Lucas lets slip that he and Peyton kissed during the shootout, this hurts Brooke even more and she leaves him.
Brooke breaks up with Lucas, saying she feels like he did not try for the sake of their relationship. On her 18th birthday, she sees Peyton and Lucas at the mall together but does not know that they are waiting for her, and assumes that they are together. Brooke later begins dating a man named Nick whom Rachel set her up with online as Peyton a 23-year-old fashion designer but he is revealed to be the new English teacher at Tree Hill High. However, they continue dating in secret. Rachel finally finds out, and tells Brooke that Nick hit on her. Brooke confronts him, he denies it and she breaks off her friendship with Rachel. She later sees he is cheating on her with one of her models, breaks things off with him and fixes things with Rachel. Brooke then rethinks about how she ended things with Lucas. Half out of spite and frustration with Peyton, she asks Lucas to be her date for the end of the season basketball banquet. However, as the two listen to Whitey speak of his beloved late wife, they realize their relationship is over and become friends again. After the state championship game, she realizes that Peyton is the one that Lucas wants to be with and encourages him, yet still harboring feelings for him.
Brooke's Yearbook picture, taken in "Pictures of You" (episode 4.13)Rachel then pretends to need Haley's tutoring so that they can steal the answers to a Calculus test for Brooke who is failing it but they get caught and pretend to have joined the Clean Teens as an alibi. There she meets Chase Adams (Stephen Coletti), a virtuous and attractive Clean Teen, who had also been betrayed by his lover and best friend and they tip-toe back in the world of loving. During a class assignment, Brooke reveals to Chase that she cheated on the Calculus test and that she thinks she isn't pretty enough or talented enough for him. He tells her that she is good enough, and all she needs to do is to stop lying and be herself. They kiss and begin a new relationship together. The next week Chase and Brooke attend an event at Nathan's house. Sadly, it is on this occasion that Brooke's promiscuity comes to light once again. A tape entitled "Nathan Scores" was to show game footage but instead cuts to Brooke and Nathan having drunken sex. After the tape is turned off, Brooke quickly starts to apologize to Peyton, but is quickly cut off of as Peyton punches her in the face causing her to have a black eye on prom. Because of the tape, a lot of people are mad at Brooke. First is of course Haley. She wished Brooke had told her about the tape earlier. Next is Peyton. She is angry that Brooke completely cut her out of her life for being honest about her feelings when she felt Brooke was never honest with her. She tells Brooke how much it hurt her when Brooke made fun of her mom’s death. Peyton told Brooke that she was dead to her. In the end, Peyton takes a black light marker and writes "whore" on Brooke's dress. Brooke interprets that as Peyton still caring about her. After hearing from Lucas that Peyton isn't going to prom, she suspects something is up and goes over to her house. Her front door is locked, so she's goes to the back knowing there is a hide-a-key. Derek spots her, and as Brooke makes her way down Peytons' basement steps in time to see Peyton tied up, he has his hand to her throat, and she's tied up next. When Peyton asks what she's doing here she replies that they've been talking about senior prom since they were 8, she knew something was wrong if Peyton wasn't going. Peyton manages to convince Derek to let her kill Brooke, but instead stabs him. Untied, Peyton tries to untie Brooke, but as Derek starts to move and get up, Brooke tells Peyton to run, which she does. In her room, Peyton starts to punch and kick Derek, punishing him for everything he's done, but he over powers her and as he is about to rape her, Brooke shows up and hits him with an axe. They continue to fight onto the stairs, until Brooke kneels down on all fours and says to Peyton, "8th grade cheer camp." Peyton kicks Derek so he falls over Brooke down stairs. They both walk down to see his body, Brooke carefully stating that they always jump up. He does, but Peyton kicks him. They rekindle their friendship with Brooke saying, "I guess it's hoes over psychos now." They go to prom together where Brooke is elected Prom Queen.
Brooke and Chase dancingThe next day at school, Brooke meets Chase again, and he says that he kept trying to call her after she was tied up by Ian Banks. Brooke ignored Chase. After receiving a cryptic message from Mouth, the entire gang consisting of Brooke, Haley, Lucas, Skills, Nathan, and Peyton set out on a cross country road trip to Honey Grove, Texas to save him. Upon returning from her road trip, Brooke and Chase reconcile. Now that Brooke and Chase are dating again, they have sex at the graduation party. She becomes the godmother to Haley and Nathan's newborn son, James Lucas Scott. Brooke and Peyton prepare to spend the summer in LA, with her parents.
Three years in the past, she meets Lucas in NYC and has drinks with him. He shows her his engagement ring for Peyton and when she puts it on; everyone believes that they are engaged. They get free drinks and even a romantic horse-drawn carriage ride because of this. When they arrive at Lucas' hotel room, he kisses her and she pulls away, not wanting to betray Peyton. While hiding her feelings, she leaves the hotel room and goes home. After confessing that Lucas Scott was the one boy she would have lost everything to be with, she accepts her mother's offer to expand her blossoming clothing line, wanting to get lost into work herself.
Having become a multi-million dollar household name, Brooke runs her clothing line, magazine and channel. Becoming fed up with her fake celebrity life, she goes back to Tree Hill, after a distraught call from Peyton Sawyer. There she becomes a "fill in nanny" for Jamie and buys out Karen's Café in order to run her fashion business from her hometown, Tree Hill. Also, eagerly wanting to live in Tree Hill, she randomly buys a home (furniture and all) and invites Peyton to live with her. However, the CEO of her company, who also turns out to be her mother, Victoria, is not happy at all about Brooke's choice to stay in Tree Hill, and arrives unexpected to her new house to take Brooke back to New York.
Lucas, Brooke and Peyton at opening of COBBrooke and Victoria "bond" over the store opening, but she is oblivious that Victoria is running around insulting all of her friends. The store's opening is both a social success and a commercial failure, leading her mother to tear her down. She then reaches the breaking point after her mother attacks Peyton and rejects her daughterly love confession, beginning to rule her company her way and refusing to consider Victoria her mother any longer.. She then considers dating Owen and sets Mouth up on a blind date with Milicent. She tells Peyton to go after Lucas because they are meant to be and comforts her after she finds out he proposed to Lindsey. She then uses the naked-in-the-back-of-the-car trick on Owen and successfully gets his attention but then refuses to sleep with him. She then slowly becomes friends with Lindsey but after they get stuck in the library with Haley, Peyton and Mia, Peyton tells her that she's her best friend and will always be, stopping the awkwardness. She travels to New York with Owen after she challenges him since he thinks she does nothing for her job. She shows him a space she bought to expand and they find Rachel, overdosed on drugs. Feeling guilty for firing her earlier, Brooke takes Rachel back to Tree Hill with her so she can live in Brooke's big house with her and Peyton.  She attends Lucas and Lindsey's joint party with Owen, who brings along a surprise guest- Chase, whom she had unknowingly set Peyton with. She finally fires Victoria from the company after she scares Rachel off for monetary purposes. She tells Peyton and Lucas that she came back to Tree Hill to have a baby, because there was a void in her heart only having a family could fill.  Due to this decision Brooke gets interviewed by a woman from an adoption agency and finds out she spoke with Victoria. Due to her young age, busy life and party past, Brooke is turned down. However, she gets to have a baby, as she gains momentray custody Angie who is there to get her heart operated on and finds it immediately challenging, but finds comfort and help in the form of Peyton and a now closer Lucas She is upset that Angie won't smile to her, believing this would be a proof she is doing right. However she finally manages to after taking her to a meeting with Macy, where she unveils her baby clothing line, Baby Brooke Brooke is terrified and distraught over the possibility of Angie not making it through her surgery, but Angie comes out perfectly and everything in Brooke's world calms down. She then has to return Angie early making her distraught but once again closer to Lucas. In the season finale, Lucas calls someone asking that someone if she wants to get married at Las Vegas - the someone could be Lindsey, Peyton or Brooke.
Clothes Over Bros
Brooke's flair for fashion design is first revealed in the beginning of Season 3, when she creates a sassy she-devil costume for the Masquerade Ball at Tric. As an employee at clothing boutique Suburban Filth, she offers some of her creations to the store and eventually has her designs on display. When proper credit is denied, Brooke and Peyton return to the shop to 'take back' her clothing. This incident lands Brooke, Peyton (and an innocent Haley) in jail. This recent set-back (along with complications in the relationship department) leaves Brooke feeling very discouraged, but Haley convinces Brooke to stop letting boy-troubles from taking over and pursue the other love in her life, clothing design. Instantly inspired, Brooke seals the deal with a new catch-phrase, Clothes Over Bros.
The initial Clothes Over Bros line features styles from casual to dressy. It was an immediate hit with her customers, selling past their expectations on the website (which, in actuality, is also a valid retailer for One Tree Hill fans interested in purchasing the designs). Clothing lines success grew, putting Brooke in a difficult position of choosing between showcasing her designs at a New York Fashion Show and starting her career, or leading her Tree Hill Cheerleaders to their final competition. In the end, Brooke chose the latter once she realized that she was not yet ready to enter the fast-paced world of Fashion and was more than happy to finish off her Senior Year with her friends. During an interview with the school's counselor, Brooke voices her intentions of studying Fashion Design after High School.
Clothes Over Bros continues to be recognized in Season 4, with Brooke's designs appearing in local fashion shows. When Brooke is involved in a cheating scandal, she's forced to keep from turning herself in to administration in order to maintain an offer to sell her clothing line by Victoria's Secret. She eventually does turn herself in to the principal, but does not get into trouble.
In season 5, Clothes Over Bros has become a full blown fashion company headed by Brooke Davis herself but with the business side carried out by her mother Victoria. The Clothes Over Bros dynasty consists of B. Davis magazine and a high end Couture line.
The Clothes Over Bros logo (C|B) is incorporated on Peyton's drawing of a heart on fire. The label's name itself is based on the saying between Brooke and Peyton, "Hoes Over Bros".