Rebekah is the paternal aunt of Hope, the daughter of Niklaus Mikaelson and Hayley Marshall. Hope's parentage and unique status as a living hybrid made her an ideal target for exploitation or sacrifice by numerous adversaries even before she was born. Rebekah, whose relationship with Klaus (or Nik as she calls him) had been strained for centuries, had left New Orleans not long before Hope was born to start a new life for herself.
By the time Hope was born, the supernatural situation in the city had deteriorated to the point of all-out war between the Original Vampires, non-original vampires, witches, werewolves and mortal factions. Hope's parents along with Elijah, her paternal uncle, knew that she would be under constant threat from these enemies. Wanting a happy life for their daughter, Hayley and Klaus concluded that it would be best if she was not raised in the embattled city. The first step to achieving this goal was to convince the world that their newborn child had died on the day she was born. In order to ensure Hope's safety, Klaus then called upon Rebekah - who, despite their troubled history, he trusted above all others - to take and raise his daughter in secret, far away from those that would see her dead. She gladly did so, promising Klaus that Hope would be happy.
Currently, in order to protect her niece, Rebekah carries one-fourth of the Hollow's spirit. She is unable to ever see Hope again, doing so would put her in danger.
In House of the Rising Son, Rebekah saves Hayley and Hope twice. Rebekah is first able to save Hayley and Hope from a group of Marcel's nightwalkers, remarking "that is not how you treat a pregnant lady!". Later in the episode—after Hayley tell's Klaus she is willing to abort the baby—Rebekah saves Hayley and Hope from an angry Klaus, stating that he preaches about not wanting the child but is willing to punish Hayley for trying to kill it.
In Girl in New Orleans, Agnes suggests that Hayley should go for a routine check up on the baby, Hayley remarks that she can't just go to the Quarter for a checkup. Rebekah states that she is surprised that Hayley is not taking all the precautions to take care of Hope as some people—including Rebekah herself—would kill to be able to have a child of their own.
"Well, if I can't, you make sure to tell that little girl stories of her crazy Auntie Bex. And let her know that despite my absence, I do love her very much."
In Farewell to Storyville, Rebekah–after being released by Klaus–appears to Hayley to say her goodbyes. Along with her goodbyes to Hayley, Rebekah warns Hayley that Klaus is mean but does want something more from life than to be feared. Along with the warning about Klaus, Rebekah warns Hayley that the Mikaelson Family have an endless list of enemies and Hope will inherit them all, she also asks if Hayley will tell Hope stories about her 'crazy aunt Bex'.
"In spite of our differences, Rebekah, there is no one I would trust more with my daughters life."
In From a Cradle to a Grave, Klaus and Hayley make the decision to fake Hopes death in an attempt to protect her from the Ancestors. However, Elijah is adamant that there is nobody that can protect the baby more than he and her parents, however, Klaus reminds Elijah that there is one more person, Rebekah. Having initially left town after being exiled by Klaus, Rebekah returns to New Orleans to collect baby Hope. Joyed to see her baby niece for the first time, Klaus explains to Rebekah that in spite of their differences, there is nobody he would trust more with his daughter's life than her. Rebekah is happy that Klaus wants her to look after Hope as it will give her a shot at a human life, to which she promises she will do whatever necessary to protect the baby from her grandmother.
In Rebirth, Hope is living with Rebekah away from New Orleans. Rebekah tells Hope about her father and the circumstances that caused her to be sent away. She tells her this in the style of a fairytale. Rebekah then puts Hope to bed placing the wooden knight toy with her.
In The Brothers That Care Forgot, Rebekah takes Hope to the park. Rebekah is pushing her on the swing when she notices her mother's starlings staring at her. Rebekah believes her mother has found them so she calls Elijah. Elijah meets with Rebekah in the diner and he holds Hope. Rebekah notices a worrying change in Elijah's behavior and when she goes to give Hope a diaper change she sees he has killed people in the diner. She puts Hope in her carrier and she snaps Elijah's neck in order to keep Hope safe.
The Originals Season One
Rebekah: Listen, about Nik, he is a monster. Do not ever cross him. But he does want more from life than to just be feared. He's just too broken to admit to himself. But I do believe there is hope for him and the baby that you carry. And speaking of your child, our family has no shortage of enemies. She will inherit all of them. Please, be careful.
Hayley: You know you can always come back and visit. I've been known to keep a secret or two from Klaus.
Rebekah: Well, if I can't, you make sure to tell that little girl stories of her crazy Auntie Bex. And let her know that despite my absence, I do love her very much.
Rebekah: "Once upon a time, there was a majestic king, who lived with his noble brother in a colorful kingdom where music and art were celebrated. The king did not foresee having a child, but he lived in an enchanted land where all things were possible. In time, he was blessed with a beautiful baby daughter for whom he wished only peace and happiness. Still, the king had demons who pursued him. There was a ruthless beast who wanted to take the kingdom for her own. Armed with a pack of untamed creatures, she drove the other magical beings from the land. And there was a wicked sorceress with enchanted stones that weakened the king on every full moon. Seeing the shadow his enemies cast upon his home, the king was driven to send his beloved princess away, convincing all who remained that she was forever lost. The king, in his sorrow, turned away from the world. The castle closed its doors and the kingdom fell. Some say that the only light that shines in the castle illuminates the shadow of the once mighty king in the room meant for his child. But as the ruthless beasts took rule over the fallen king's realm, little did they that he and his brother would not rest until their enemies were vanquished. For they believed that one day, they would heal their kingdom and bring their princess home so that she might live happily ever after."