Rebecca (レベッカ Rebekka) is an Adventurer and B-Cuber from the planet Blue Garden. Her goal is to gain one million subscribers for her Aoneko Channel. She is a member of the Guild Shooting Starlight and the new Demon King's crew of the Edens Zero.
Rebecca is a young girl with large blue eyes, fair skin, and wavy ash-blonde hair that reaches to her waist, fashioned with a red clip on the left side of her head. A pair of triangle-shaped earrings hang from her ears along with a necklace displaying an image of a heart circling her neck. Her arms are covered by a pair of black and gold sleeves that only leave her shoulder and hands visible; an intricate figure completes the article at the top. She wears a blue-collared, white jacket that bares her large bosom and is styled with a heart-shaped zipper hanging in between her chest; hugged by a simple white, sleeveless shirt underneath. She completes her outfit with a short, black and gold skirt with a slit on the side and long, black and gold boots.
Rebecca is a friendly and bubbly individual. Despite having her initial misgivings about Shiki, she decides to take him with her when she was fleeing Granbell, telling him that they were friends despite having known each other for only a short time. However, Rebecca has shown a bit of an impulsive side as she cut Shiki's hair without his permission as its unruly nature was bothering her. She is also ambitious as she has a desire to reach 1 million subscribers for her Aoneko Channel. Rebecca thinks of herself as famous B-Cuber, to the point where she wears glasses to disguise herself in public. She is also willing to use her own sex appeal in order to get views, even considering using footage of her struggling in restraints to get people's attention.
When she is in battle, Rebecca's personality changes, developing a very crass attitude and yelling at her enemies to "die", and grinning with a very vicious smile
Above all, though, Rebecca is a very kind and selfless person. She is willing to cry for Shiki over the Granbell robot's apparent betrayal, not caring about Happy being turned into a cyborg, and standing up to Rogue Out when they threatened to hurt the captured B-Cubers .
When she was very young, Rebecca was abandoned by her family. One day, however, she met Happy, the two becoming best friends, the blue cat's similar history of abandonment leading the duo to promise that they'd always be there for each other. However, one day, Happy got run over by a drunk driver, the only way to save him was to turn him into a "machine cat". Despite this, Rebecca kept her promise, it didn't matter what Happy looked like.
Rebecca and Happy travel to the Granbell Kingdom in their spaceship, the Aqua Wing, in search of good footage for Rebecca's B-Cube Channel. While there, they take part in many of the park's amenities, including a monster hunt. While on that monster hunt, they are confronted by a large, robotic cat which is quickly destroyed by a strange man with long hair. Rebecca is shocked by the man's appearance and hits him when he begins to grope her and asks her if she is human. He then informs her that he is the only human present and asks her to be his friend - an offer she refuses and she along with Happy head back to the town. Although, the strange man follows her.
When she makes it back into the town, she informs the robots there of the man's presence and she is informed that the man in question is really Shiki Granbell - the sole human of Granbell Kingdom. After the two are formally introduced, Rebecca, along with Shiki, Happy, and the robots of the kingdom throw a celebration. When Shiki falls asleep, Rebecca is told about Shiki's background and after cutting his hair, she retires to bed herself. While she is sleeping, she and Happy are abducted by Castellan and the rest of the robots of Granbell who are seemingly trying to steal her ship. However, they are rescued by Shiki who tries to sacrifice himself for their sake, but Rebecca tells him that they are friends and the three flee Granbell together.
After escaping Granbell with Shiki, Rebecca and Happy introduce him to their B-Cube channel, the Aoneko Channel, and explain what B-Cube is. Rebecca also tells Shiki she plans to register him as an adventurer in her guild, Shooting Starlight, before asking him to serve as her bodyguard for a while, who accepts.
After arriving on Blue Garden and calming Shiki down, Happy is suddenly kidnapped by a group of thieves. As Shiki follows the kidnappers, Rebecca remembers how she and Happy first met before following them. After catching up, she demands that the thieves give Happy back, vowing to never forgive them if they hurt him. As Shiki battles the thieves, Rebecca and Happy reunite, revealing Happy's true, cybernetic form as he turns into a pair of ether guns before shooting all the enemies and taking them down with Shiki's help. Afterwards, the two explain how Happy is a cyborg and how there are a lot of robots like him out there as they finally arrive at Shooting Starlight
Skull Fairy arcEdit
Rebecca is abducted and taken to Guilst where she learns all the females in the room be B-Cubers.
Powers and AbilitiesEdit
Marksmanship Skills: Rebecca is very skillful in marksmanship, displaying the ability to wield up to two Ether blasters at once. She is capable of making accurate headshots on two or more targets in rapid succession, something that is considered to be extremely difficult.
Piloting Skills: Rebecca has displayed the ability to pilot the Aqua Wing, her ship, flying the ship through the cosmos with ease. Although the extent of her skills is unknown.
- Rebecca shares most of her character design with Lucy Heartfilia, a female character from Hiro Mashima's previous work, Fairy Tail.