Sakura Banka embodies the lost memories of Kikka, extracted after Kikka ascended as King. She persists solely as a soul, lacking a physical form. Awakening devoid of identity or origins, Ichinose revealed her true nature to her. Her existence is perilous; unable to fight in Rebuild Battles, defeat could mean death due to her non-corporeal state.

Her personality is generally focused, yet her mood shifts noticeably, often revealing a lighter side among friends. She wears a bright orange scarf, a school-style shirt and skirt, and a yellow diamond hair clip gleaming distinctly.

Her role becomes pivotal when Teruto Kurabe discovers her. Seeking someone worthy to grant her wish via the Rebuild Matches, she faced an attack from another player. Teruto intervened, saving her life and prompting her to test his strength. After he defeated her in battle, she entrusted him with her wish, placing her faith in him to achieve it. Her documented involvement is only within *Build Divide -#000000- Code Black*.