Movie
Description
Akira Himi, known as the Burst Linker Aqua Current, initially operates as a bodyguard for low-level players. She partners with them to raise their Burst Points in exchange for recording their real-world identities. A significant event reduced her level to one, earning her the nickname "The One" and prompting this role. She later rejoins the Black Legion, Nega Nebulus, following the ISS Kit incident.

Originally a level-7 member of Nega Nebulus's elite Elements group, representing water, she sacrificed herself during a failed assault on the Unlimited Neutral Field's Imperial Palace. This saved comrades but triggered Infinite EK at Seiryuu's altar. Seiryuu's Level Drain reduced her to level one, causing her departure from the legion. Her early Accelerated World involvement included mentorship under Magnesium Drake after her "Parent" suffered Brain Burst uninstallation and memory wipe. She advised Mihaya to join the Red Legion Prominence due to geographical distance from Nega Nebulus territory. After the Imperial Palace incident, Akira attempted to erase Mihaya's memories of her, leading to prolonged separation before their reunion.

In reality, Akira appears as a young girl with short brown hair, yellow eyes, and red-framed glasses. She typically wears a white turtleneck under a gray coat, contributing to an androgynous look. Her virtual network avatar is an otter with brown and white fur, red glasses, and a small red tie. As Aqua Current, her duel avatar manifests as a feminine humanoid form enveloped in flowing water that forms pigtails. This pure water armor appears transparent or refractive depending on the environment. The avatar adapts to stages like Ice or Volcano, forming ice weapons/armor or emitting steam-based area attacks.

Akira exhibits a reserved demeanor, rarely showing emotion but speaking directly. She serves as Nega Nebulus's intelligence specialist. Key relationships include being Blood Leopard's cousin and "child" in the Brain Burst program, revealed during her rescue. She shares a longstanding bond with Kuroyukihime as childhood friends and fellow Elements members.

Her plot spans multiple arcs. In the "Return of the Black Snow Princess" side story, she aids Haruyuki Arita (Silver Crow) in a tag match against Sand Duct and Nickel Doll. Later, she tests Haruyuki's trustworthiness by dueling him and erases his memory of her identity using "Memory Leak" after confirming his reliability. During Silver Crow's battle against Wolfram Cerberus, she deflects Argon Array's lasers by refracting them with her water armor, enabling Haruyuki's counterattack. This leads to her rejoining Nega Nebulus after a real-world meeting with Kuroyukihime and Haruyuki.

The "Aqua Current Rescue Mission" sees Nega Nebulus and Prominence members free her from Infinite EK at Seiryuu's altar. Blood Leopard sacrifices points to absorb a level-draining orb during the escape. In the ISS Kit arc, Akira participates in the Midtown Tower assault, pairing with Black Lotus, Sky Raker, and Ardor Maiden. She blinds the ISS-controlled Red Rider with water projectiles and destroys the main body's core using her "Phase Trans - Keen" Incarnate ability, while "Phase Trans - Adamant" defends against attacks. She later fights in Minato III Territories against the Oscillatory Universe, enduring abilities like "Last Glacial Period" and "Brinicle."

Aqua Current's abilities center on manipulating her water-based armor. "Achromaticity" enables adaptation to environmental stages, forming ice in Ice stages and steam attacks in Volcano stages. Her "Water Armor" flows to envelop allies or surfaces, and she can fire jets by expending portions. "Theoretically Pure Water" renders it an electrical insulator and light refractor. She also uses "Hydro Auditory" for enhanced perception and "Memory Leak" to erase memories of her real identity. Mobility includes sliding across surfaces and wall-climbing via water adhesion.