Lana, youngest daughter of Count Vance and sister to Claudette, Leina, and Elina, commands the Vance Royal Guard as its Captain. This role requires mastery of martial arts, stealth, military discipline, and assassination techniques, with duties encompassing her father's protection, espionage, and lethal operations.

She dons tiger-themed armor and fights primarily with a clawed gauntlet and spear. Her demeanor shifts between ruthless viciousness and a childlike playfulness around her sisters, especially Leina, toward whom she nurtures complex feelings laced with naughty thoughts.

Lana wields "cursing words" as a weapon to inflict direct mental or psychological harm.

In the Queen's Blade Rebellion, she joins Queen Claudette's forces as part of the Queen's Army after Claudette's rise to power, realigning her loyalty amid the continent's political strife.