Carly and Harper

 are main characters of iCarly (2021). They are best friends and roommates who live in Bushwell Plaza

Relationship
Carly and Harper first met at Skybucks Coffee Bar. They bonded over The Real Widows of Wisconsin during Harper's break. Carly later invited Harper to live with her in her apartment.

Carly's Nicknames For Harper

 * BFSS (Best Friend Since Sam) (iGot Your Back)
 * BFSSBSJBARN (Best Friend Since Sam But She's Just Being Annoying Right Now) (iGot Your Back)

Harper's Nicknames For Carly

 * BFUMCER (Best Friend Unless My Cousin Ever Resurfaces) (iGot Your Back)

iStart Over

 * It's revealed they are roommates.
 * Harper comforts Carly over her break up with Beau.
 * Harper convinces Carly to go to Spencer's party.

iHate Carly

 * Harper (and Spencer and Freddie) try to help Carly find her hater.

iFauxpologize

 * Carly took bite her spicy meatball with her expression as Harper took picture from her smartphone.
 * Harper sends picture to Carly with her on the spicy meatballs.
 * Harper came up an idea to sell merchandise with her t-shirt of Carly's spit on the meatball.

iGot Your Back

 * This is the first time they have a fight, but they eventually make up.
 * Carly tells Harper about the invite to a fashion show.
 * Harper offers to design Carly's dress for the event.
 * Carly is happy when she realises Harper used her old dress.
 * Harper helps Carly when the dress starts to rip.
 * Harper tells Carly she won't let go of her when the dress is ripping.

i'M Cursed

 * Harper puts bubble wrap around Carly's waist.
 * Harper tells Carly to do a catwalk to show her new "bubble wrap" look.

iNeed Space



 * Carly and Harper share their workspace together in iCarly studio.
 * Carly and Harper argues about their workspace.

iMLM

 * Carly has told Harper about her ex-boyfriend Griffin.
 * Carly helps Harper when she is getting ready for her interview.
 * Harper tries to warn Carly when she realised Griffin conned her into selling fish food.
 * Harper wants to punch Griffin for using Carly.
 * Carly is supportive of Harper when she tells her she quit her job.

iTake a Girls' Trip

 * Harper tells Carly and Freddie about her former college roommate, Brooke.
 * They plan on going on a girls trip together.
 * They both feel like a third wheel in their situations.
 * They face time each other and have a virtual girls trip.
 * They have a girls lunch with Maeve.

IReturn to Webicon

 * Harper preps Carly's outfits for Webicon.
 * They talk about their relationships.
 * Carly can tell that Harper is interested in Dutch.

iObject, Lewbert!

 * Carly texts Harper
 * Harper leaves Millicent to go and support Carly in court.

i'M Wild and Crazy

 * Carly wants to do some wild things with Haper
 * Harper wants and tries to protect Carly from doing things she will regret.
 * Harper asks the tatoo artist to do a fake one for Carly as a way to protect her.

iHit Something

 * Harper helps Carly and comforts her when she feels low.
 * Harper is supportive of Carly in the ring.

Trivia

 * They are roommates.
 * They met when Harper was working and they bonded over a show.

Credits to

 * iCarly Wiki on Fandom