Chorus emerged from an accidental magical splitting of Valkyrie's younger sister in early childhood, forever separating her from her original twin, Sancho.

She matured in isolation within a separate dimensional plane, long unaware of Sancho. This solitary existence fostered a personality marked by shyness, introspection, and quietness distinct from her sister.

A deep-seated longing to reunite with Sancho defines her core motivation. Chorus believes only merging back into a single entity can grant her completeness and overcome the profound loneliness born of their forced separation, driving her initial actions.

Discovering Sancho's existence becomes a pivotal moment. Overwhelmed by the need for wholeness, Chorus's initial attempts to forcibly merge create significant conflict, revealing both the psychological toll of their separation and the immense power they wield when emotions surge.

Gradual interactions with Sancho and others foster development. Chorus confronts her isolation and begins to grasp Sancho's perspective, leading to a complex relationship oscillating between conflict and an emerging, instinctive bond.

A critical evolution occurs when Chorus and Sancho achieve a temporary, stable merger. However, experiencing unified existence leads to a profound realization: they consciously reject permanent fusion.

This choice signifies major growth. Chorus moves beyond the desperate need for completion, embracing her existence as an independent individual. She accepts that she and Sancho are distinct persons, valuing their separate identities and the unique bond they share as sisters, not fragmented parts.

While choosing individuality, the deep, intrinsic connection to Sancho remains fundamental to her identity. They learn to coexist, support each other, and wield their complementary powers collaboratively, finding a new harmony based on mutual acceptance, not physical fusion.