TV-Series
Description
Lucia Rea Regulus, also known as Lu, serves as the Third Princess of the Regulus Empire. She appears as a twelve-year-old girl with distinct silver hair cut to neck-length, featuring two longer strands framing her face and reaching her chest, alongside green eyes. She typically wears a silver tiara. Her standard outfit is a white blouse, pleated skirt, black tights, short white boots adorned with green bows, and an indigo vest.

Born into the imperial family, Lucia's life shifts dramatically when soldiers target her for execution during an attempted coup. She is rescued by Touya Mochizuki, who also saves her father, Emperor Zephryus Roa Regulus, and her elder brother, the crown prince. This rescue sparks an instant romantic attachment to Touya. Following the coup's suppression, after discussions with his existing fiancées, Lucia becomes Touya's fifth fiancée and later marries him, adopting the names Lucia Brunhild or Mochizuki Lucia. Their marriage produces a daughter, Arcia Mochizuki.

Lucia possesses a competitive spirit and a strong aversion to defeat. She cultivates a deep passion for cooking, starting with no commoner skills like food preparation. Her dedication ignites when Touya appreciates a picnic meal she prepares, motivating her to refine her abilities under chef Claire's mentorship. She specializes in Eashen-style cuisine, Touya's preferred dishes, and gains renown for sharing recipes globally via smartphone applications, earning admirers among royalty and professional chefs.

In combat, Lucia is a proficient twin-sword wielder. Touya provides her with Phrasium crystal swords, noted for exceptional lightness and durability. She pilots a personalized Frame Gear, Waltraute, a raid-type mecha capable of shifting between four combat modes: Attacker (dual swords), Booster (thrusters), Launcher (long-range cannon), and Defender (reinforced shield).

As a divine blessing from Touya, Lucia gains the Dependent Trait "Super Taste Sense" or "Gusto Absoluto," enabling her to perfectly identify and replicate any dish she samples. Her engagement ring, a sacred artifact from the World God, grants access to basic Null Magic spells: 【Accel】, 【Storage】, 【Recovery】, and 【Transfer】.

Lucia maintains a close friendship with fellow princess Yumina Ernea Belfast due to their similar age and status. She integrates into Touya's household as the Second Queen of Brunhild Dukedom, actively participating in the "Bride Conference" to evaluate potential additions to his fiancées. Her personal journey evolves from imperial royalty to encompass roles as an adventurer, chef, and combatant, strengthening diplomatic ties through her culinary contributions.