They keep the longest relationship on the series until Jo accepts a three-year movie deal to New Zealand and moves there (thus breaking up with Kendall).
Kendall is the only one who never caught "Hollywood Fever", which turned out to be a subconscious manifestation of homesickness, because he never lost touch with the life and hobbies he had in Minnesota.
He is kind, helpful and always there for his friends and also he is shown to be good at maintaining relationships, as he shares great friendships with the boys, his sister and his mother.
In season 3 "Big Time Returns", Kendall had to run around the Palm Woods in his underwear because he talked to Lucy when James called dibs on her.
In Big Time Surprise he and Lucy share their first kiss but are interrupted by Jo who has come back to the Palm Woods, forcing him to decide between the two.
His mother, Brooke (played by soap opera veteran Lisa Rinna), is considered the "Estee Lauder of the Midwest" for her successful cosmetics line.
He is also very superstitious, believing in ghosts and the paranormal, as well as being cautious of bringers of bad luck like black cats and broken mirrors.
He also had a short relationship with Sasha, a girl Gustavo hired to date him and a visit from his long ago big time crush, Heather Fox who once seemed to like him, but fails to win her back.
Gustavo Rocque (Stephen Kramer Glickman) is a world-renowned but hot tempered record producer who auditions the boys in Minnesota and brings them to L.A. to make them stars.
Gustavo reveals that he has been banned from all hotels in Los Angeles, along with Russell Crowe, Aerosmith, and the "original host of Blue's Clues" (Steven Burns).
She is an aspiring singer and actress, although she has only sung along with the group and their friends in the episode Welcome Big Time and plays Rachel in the show "New Town High".
She firstly decides to reject the chance, not wanting to lose Kendall, but he unwillingly urges her to take the once in a lifetime opportunity for her best interests, and so she leaves.
Also it seems he set eyes for Big Time Rush's apartment (2J) after it got fixed and has already given them two of the three strikes (of false behavior) needed to evict them.
During "Big Time Moms", it was revealed that in the past, Bitters quit veterinarian school to follow his girlfriend, an aspiring actress, at the Palm Woods and after he spent his entire money supporting her acting career, she dumped him and he landed a job there.
In "Big Time Rocker", we learn that Bitters keeps his savings in a house safe which Camille, as Mila Stark, robbed.
Arthur Griffin (Matt Riedy) is the CEO of conglomerate RCMCBT Global Net Sanyoid Corporation, which owns Rocque Records.
Camille Roberts (Erin Sanders) is known as the "Method Actress Queen" of the Palm Woods and can always be seen practicing her lines around the pool before her auditions.
While she has been implied to be a good actress, she herself has admitted how she had to go to 32 auditions before landing a role, probably due to her deep emotional investment into her characters and sometimes extreme measures.
He had a major role in Big Time Girl Group, where Katie and Mrs. Knight hide him from his mother during their various attempts to find friends at the Palmwoods.
Guitar Dude (Barnett O'Hara)[2] is a teenage songwriter trying to make it in Hollywood and lives at the Palm Woods, home of aspiring child stars.
One of the shows running gags is every time they enter a scene, they move in slow motion as if on a runway, Jennifer 2 always being in the center and the others holding her arms.
Jett Stetson (David Cade) is portrayed as a cocky, self-centered actor who appears in Welcome Back, Big Time and plays a character in the television show New Town High alongside Jo.
Lucille "Lucy" Stone (Malese Jow) is the new girl at the Palm Woods and secondary love interest for Kendall, first appearing in Big Time Rocker.
In her first appearance, Big Time Rush were paralyzed by her looks and guitar skills, while James and Carlos kept on trying to date her, though she claimed she just wanted to be friends since she'd just had a nasty breakup with her last boyfriend.
She also challenged Kendall by telling him that their music was cute, catchy and danceable, but just doesn't rock, forcing him to prove her wrong, which happened when Big Time Rush blocked traffic in downtown L.A. and sang their new song Paralyzed.
She is a real estate agent, and she used her job to help convince James's mom to let him stay in L.A. by finding a place for her to open up an office on the West Coast, thus allowing her to see her son at least once a month.
Sir Atticus Moon (Trevor Devall) is a Bond type villain and famous billionaire, who owns various businesses across Britain and possibly the world.
In Big Time Movie, when her father goes rogue, she sets out to find a device called "The Beetle" that ended up in Kendall's possession.
Later Jordin is pushed down a well after all the boys get in the well after many attempts to get they figure out the song and call Freight Train there is also a skunk who Gustavo and Kelly are getting rid of.
In the end, while BTR is escaping from Bel Air, Fabio too begs them to take him with them due to being unhappy with being mauled by the tiger and they agree.