Zana Lashka serves as the Blood Servant and 72nd wife of the First Primogenitor, Ki Juranbarada. She possesses striking golden-red hair reminiscent of the sun and favors simple, figure-accentuating attire like leather pants with knee cut-outs and a shirt. Her appearance presents a compelling contrast between a mature physique and an innocent facial expression. Exhibiting a lighthearted and relaxed personality, Zana frequently teases others for amusement, showing particular fondness for interactions with younger girls such as Yukina Himeragi and Yume Eguchi. Her playful provocations include kissing Kojou Akatsuki to elicit reactions. Despite this demeanor, she maintains composure during tense situations, dismissing insults about her status as Ki Juranbarada's "lowest-ranked" wife. Zana also displays a ferocious enjoyment of combat, actively participating in events like the Electoral War. Her background establishes her as Ki Juranbarada's favored concubine. During key events, she played a critical role by transferring the Beast Vassals of the "Vampire King" to Kojou Akatsuki via a kiss after Kojou relinquished the Fourth True Primogenitor's Beast Vassals. She later provided material containing Kojou's vampiric flesh to Yukina, which was fashioned into rings for Kojou's Blood Servants, facilitating the formation of Kojou's protector circle. In the conflict involving the Kingdom of the Valkyries, Zana assisted Ki in evading adversaries at an airport and subsequently aided in apprehending the antagonist Radori Ren, though she was temporarily incapacitated by petrification. Zana wields exceptional combat abilities, specializing in close-quarters combat with silver metal knuckles imbued with the Divine Oscillation Effect to nullify barriers and demonic energy. She overwhelms opponents using advanced weaponry like Yukina's Snowdrift Wolf and Sayaka Kirasaka's Lustrous Scale. Her high-level alchemical mastery is demonstrated by instantly transforming a knife into a chain. Her fighting style blends physical ferocity with strategic equipment use, instilling despair in adversaries. Her relationship with Ki Juranbarada is defined by loyalty and her status as his Blood Servant. She interacts antagonistically with figures like Ladli, mocking their age difference while revealing her own age is less than one-tenth of Ladli's. Linguistically, her given name "Zana" carries roots in Slavic languages (meaning "fairy" or "nymph"), Persian (meaning "woman"), and Greek (as a variant of "Zena," meaning "born of Zeus"). Her surname "Lashka" originates from Turkish, meaning "rider."