Description
The White King originated as an ancient ruler of the white world, historically depicted alongside the Green Princess in a significant union symbolizing an alliance between their realms. His original form bore resemblance to Yuuki Momose, while the Princess blended visual traits of Rein and Kajitsu.

Reincarnated as the stoic, gloved teenage duelist and orphan Yuuki Momose, he carries the White King’s spiritual legacy. This manifests as luminous apparitions during duels, akin to other spiritual entities. His reincarnation cycle remains intrinsically bound to the Green Princess’s lineage across eras.

In "Battle Spirits: Mirage," set two years post-Mauve uprising, the White King appears in the white world when interdimensional traveler Gallet Revolt arrives. Gallet adopts attire mirroring the King’s ancient appearance, suggesting a connection to this legacy. The White King duels Gallet, triggering Yuuki’s luminous manifestation amid broader conflicts involving Mauve leader Varte Parx and the Unified Government.

Thematically, his role extends through the "Otherworldly Records," chronicling cyclical events. His history intersects with the Otherworld King, whose actions at the original royal wedding cursed the couple and ignited their reincarnations. Gallet’s mission to alter these records involves confronting both the Otherworld King and his reincarnation Vizarga Bellagio, positioning the White King’s fate as pivotal to changing this predetermined future.

A promotional card classifies him as a Grandwalker Nexus with Core Charge and Grand Skill abilities. Its effects reflect his anime depiction—granting immunities and manipulating cores to summon spirits—while its lore explicitly ties to his "Mirage" appearance.