Harper and Millicent

 are main characters of iCarly (2021). They are neighbors and live in Bushwell Plaza.

Relationship
Harper and Millicent are friends and neighbors.

Timeline
The length of their friendship is unknown but it appears they have known each other for a while due to their relationships with Carly and Freddie. The two are friends although Millicent likes to tease Harper for being friends with Carly at several times. The first time the two really spend time together is in the episode iObject, Lewbert!, when Harper offers to watch Millicent whilst Carly and Freddie are being sued by Lewbert Sline.

iHate Carly

 * Harper says its cute that Millicent wants to help Carly find her hater and Millicent replies with "No, I want to cancel Carly".

iLove Gwen

 * Millicent manipulates Harper into making costumes for her school play, and Harper happily complies with her request.

iTake a Girls' Trip

 * Harper lets Millicent borrow her phone to order a pizza.

iObject, Lewbert!

 * Harper offers to stay and watch Millicent
 * Millicent likes how grown up Harper is and wants to spend time with her.
 * They call each other their bestie.
 * They have a spa day together
 * They go out to have pizza together.
 * Millicent interrupts Harper's date, but although Harper is disappointed, she is not mad at Millicent.

iDragged Him

 * Harper puts her arm around Millicent

iThrow a Flawless Murder Mystery Party

 * At the start of the start of the murder mystery party, when Harper is reading out her character's background, she is about to read that her character sleeps around to get to the top of her career until Millicent looks. Haper changes the word to nap so that Milloicent doesn't know what sleeping actually means, showing Haper cares about Milicent and wants to be careful around her.

Credits to

 * iCarly Wiki on Fandom