TV-Series
Description
Abandoned on Blue Garden as a child, Rebecca Bluegarden found solace in an alley cat she named Happy for the joy he brought. After Happy was killed by a drunk driver, Professor Weisz rebuilt him as a cyborg, a form Rebecca accepted instantly to honor their promise to stay together.

As an adventurer and B-Cuber, Rebecca runs the Aoneko Channel, aiming for one million subscribers. She wields her B-Cube device to document explorations aboard the dual-purpose Aqua Wing spacecraft and aquatic vessel. Physically, she has blue eyes, fair skin, and wavy ash-blonde hair often held by a red clip. Her outfits vary widely, from a blue-collared white jacket with a heart zipper to piloting jumpsuits and planetary attire. Activating her Ether Gear consistently disintegrates her footwear, leaving her barefoot.

Rebecca possesses a bubbly, friendly personality, easily bonding across species. She demonstrates selflessness, defending captured B-Cubers on Guilst and empathizing with Shiki Granbell after Granbell's robots betrayed him. However, combat transforms her demeanor; wielding Happy Blasters—firearms formed by the transforming Happy—she becomes aggressive, yelling at enemies with a vicious grin. She occasionally considers provocative footage to boost viewer engagement. Her Ether Gear, Cat Leaper, initially grants enhanced agility and jumping. Later, stimulated by Ether in the Edens Zero's spa, it evolves to rewind time in her universe by roughly 90 seconds and enables uncontrolled "leaps" into parallel universes, becoming central to multiverse events.

Rebecca met Shiki on Granbell Kingdom while filming. Escaping the planet's hostile robots together, she invited him into her guild, Shooting Starlight. They co-founded the Edens Zero crew, voyaging to find the cosmic entity Mother. Cat Leaper triggered during critical moments, like rewinding time to save Shiki from Drakken Joe. On Nero 66, she stayed with Shiki to disable antimatter bombs, causing a spacetime distortion that flung them 20,000 years into Universe 3173's future.

In this future, Rebecca died, but her body emitted persistent Ether signals. Robots repaired and preserved her form, extracting her Cat Leaper energy to create Etherion, Edens Zero's time-travel mechanism. Her trapped consciousness awakened as the crew departed for Universe Zero. Transformed into the ethereal Chronophage, she drifted through space, consuming planetary time to reclaim lost years, rewinding planets' histories and erasing individuals absent in their past states. This consumed 50 years from Norma and 1,200 years from Guilst.

In Universe Zero—a convergence point influencing all timelines—Rebecca lived an altered life where Happy remained organic. After regaining memories of past universes, she aided in confronting Edens One and restoring Mother, revealed as planet Earth. The Chronophage reverted Mother to her planetary form, allowing Rebecca to reconcile with her future self and break the transformation. Post-adventure, she gave birth to Shiki's daughter, intending to name her after the android Pino before Pino declined the honor.