TV-Series
Description
Sera, daughter of former Demon Lord Gustav, carries the title of demon princess. To shield her from the previous Hero Serge Flore's invasion, Gustav sealed her in a time-stasis spell and teleported her away, appointing Viktor as her guardian. After Kelvin's party defeats Viktor, Viktor transfers her care to Kelvin, leading her to join his group by the end of Light Novel Volume 1 and Manga Volume 2. She formally enters Kelvin's harem as the second member in Light Novel Volume 4, Chapter 3, though their relationship advancement halts in the manga due to Trycen's declaration of war.

In battle, Sera employs bare-handed strikes amplified by her Combat Technique skill, combined with Black Magic debuffs. Her unique ability Blood Dominion grants control over anything touching her blood, including spell-magic drainage. She later gains Bloodbending, allowing voluntary manipulation of her blood.

Her appearance features stunning beauty with a slender, proportionate build. As a demon, she bears horns, bat-like wings, and a tail, typically concealed by her Clip of Camouflage accessory without hindering flight or tail attacks. She favors military-style uniforms inspired by Kelvin's memories and crafted by Efil, switching to a white lab coat during golem research with Kelvin. She wields Arondight—gauntlets forged by Kelvin from Viktor’s carapace—in combat.

Raised in isolation within Gustav’s castle, she exhibits innocence and childishness yet radiates a bright, cheerful demeanor. She grows deeply devoted to Kelvin. Her hobbies include fishing and playing instruments like the piano. A natural genius, she operates on intuition and instinct rather than logic, aided by detection skills and sharp senses. This approach aids activities like sensing fish locations but complicates teaching, as seen when her Black Magic instruction to Miyabi fails.

She earns titles including "Demon Lord’s Daughter," "Mysterious, Beautiful Angler," and "Vanquisher of the Goddess." Her level rises from 75 in Volume 1 to 95 in Volume 3, boosting health points, magic points, and attributes (strength, endurance, agility, magic, luck). Her race is Archdemon; her class is Cursed Pugilist. She evolves into a "Demon Blood Lord"—a Blood Lord who is also a demon, distinct from a Demon Lord. Taught by Kelvin, her extraordinary fishing skill earns renown among Toraj anglers.

Born April 16, her passive abilities encompass Blessing of the Demon Lord, Summoning/Magic Supply (Rank S), and Concealment (Rank S). Experiences with Kelvin’s party drive her growth, from emotional vulnerability like crying upon release to playful antics such as drunkenly mock-strangling Kelvin.