Mu, also known as Mu, is a silver-haired figure with pale blue eyes and a rounded face accentuated by small, thick gray eyebrows. Their long hair features blunt bangs and looped strands tucked behind the ears, paired with a vibrant hot-pink-and-white crop top, denim shorts, chunky boots, and an array of bracelets. A collar around the neck secures a valve linked to a tube amp, while twin circular speakers adorn a belt at the waist. An input jack embedded in the lower back designates Mu as a Player, compatible with amplifiers such as the AC30.

Discovered half-buried in Liverchester’s refuse heaps, Mu awoke with no recollection of their past. Echo Rec’s attention was drawn to a glinting Core component protruding from the debris—a disturbance that triggered the pile’s collapse, unearthing the amnesiac. This Core mirrors one previously wielded by Jimi Stonefree, though Mu’s connection to it remains enigmatic. Striking similarities to Jimi include matching silver hair, ice-blue eyes, and a physique clad in stylistic nods to the guitarist’s aesthetic.

Driven by stubborn resolve, Mu embarks on a quest to reclaim lost memories, forging an alliance with Echo Rec, keeper of the AC30 amplifier. Their partnership crystallizes after evading the Noise Sisters’ assault, aided by Bilin Valentine. While their bond shifts from rescue to collaboration, the emotional undercurrents of their journey remain undefined.

The shared Core with Jimi hints at deeper mysteries entwined with Mu’s identity, yet the origins of this link and the roots of Mu’s amnesia stay obscured. The narrative orbits Mu’s relentless pursuit of self, an odyssey without resolution in recorded accounts.