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Lucia Rea Regulus (ルーシア・レア・レグルス Rūshia Rea Regurusu?), nicknamed Lu (ルー ?), is one of Touya Mochizuki's wives. Lu is also the third princess of the Regulus Empire and she is currently living with Touya and everyone else in the Duchy of Brunhild.


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LN Vol 08-12.jpg
Lu's daily attire.
Lu in her royal attire.

Lu appears as a young girl about the same age as Yumina Ernea Belfast. She has green eyes and neck-length silver hair, in which she wears a silver tiara. however, the strands near her face are much longer, reaching to her chest, so she holds them are in two "sleeves", much like Elze Silhoueska. When she first appeared in the series, she wore a torn apart white silk dress. her primary outfit now consists of a green bow and indigo-colored vest over a white shirt, a white pleated skirt, black tights, and short white boots.


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Lu is a competitive person and she hates to lose. She also diligent and loves to cook.


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  • Twin Sword Wielder - She uses twin sword as her main weapons in a fight.
  • Super Taste Sense (超感覚 Chō kankaku?) - it is Lucia's "Dependent Trait" (眷属特性 Kenzoku Tokusei?). As a "Retainer" (眷属 Kenzoku?) of Touya Mochizuki, she is bestowed by Touya's divine power with super sensitive taste buds, to such a degree that she is able to replicate any meal she's eaten[6].


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  • Phrasium Twin Swords[7] - Lu received twin swords made of phrasium (crystal material) from Touya. The swords are the same length as Yae's "Tōka". Because it made of phrasium, the swords are lightweight and its durability is stronger than any material exist[8].
  • Waltraute[9] - Lu's exclusive Frame Gears which is a retrofitted raid type FG.
  • Sacred Ring[10] - Lu received platinum gold ring from World God as wedding gift which was given through the great spirits. The ring is a sacred treasure which can act as receiver for Touya's divine power.


  • "From now on, please trust me with your daily meals, okay?" - Lucia before her wedding kiss[11].


No speculations and rumors, just fun facts!
  • According to the character introduction[12]:
    1. She is on good terms with Yumina Ernea Belfast.
    2. She is good at cooking.
  • Lucia wears the Mars Astronomical Symbol on her bow-tie and boots.
Mars Symbol on Lu's bow-tie.
Mars Astronomical Symbol.


  1. Web Novel Arc 13 Chapter #92,According to Touya, Lu is the same age as Yumina, who was 12 at that time.
  2. Web Novel Arc 29 Chapter #405,It has been two years since Touya met her.
  3. First appearance height
  4. Web Novel Arc 31 Chapter #448,Lucia married to Touya.
  5. Web Novel Arc 13 Chapter #99,Lu registered at the Alephis City's Adventurer Guild.
  6. Web Novel Chapter 29 #405
  7. Web Novel Arc 16 Chapter #114.
  8. Web Novel Arc 16 Chapter #114,Touya mentioned crystal material properties.
  9. Web Novel Arc 27 Chapter #274.
  10. Web Novel Arc 31 Chapter #449.
  11. Web Novel Arc 31 Chapter #449.
  12. Web Novel Chapter 26 #250


Duchy of Brunhild
Monarch: Touya Mochizuki  •  Linze Silhoueska  •  Elze Silhoueska  •  Yae Kokonoe  •  Yumina Ernea Belfast  •  Lucia Rea Regulus  •  Sushie Ernea Ortlinde  •  Hildegard Minas Lestia  •  Leen  •  Sakura
House of Mochizuki: Karen Mochizuki  •  Moroha Mochizuki  •  Kousuke Mochizuki  •  Sousuke Mochizuki  •  Karina Mochizuki  •  Suika Mochizuki  •  Takeru Mochizuki
Knight Order: Lain Netherland  •  Nore Siberia  •  Nikola Strand  •  Mr. Mittens
Other: Regina Babylon  •  Paula  •  Laim  •  Lapis  •  Cecile  •  Renne  •  Julio  •  Claire
Related Articles
Alliance: Kingdom of Belfast  •  Kingdom of Mismede  •  Refreese Imperium  •  Regulus Empire  •  Ramissh Theocracy  •  Kingdom of Lihnea  •  Knight Kingdom of Lestia  •  Roadmare Union  •  Demon Kingdom of Xenoahs  •  Eashen
Locations: Silver Moon Inn  •  Fashion King Zanac  •  Adventurer Guild
Group: Babylon Sisters  •  Four Heavenly Beasts  •  Bride Conference  •  Elite Four