TouyaSpoil Spoiler Alert: The following article has information not currently present in the anime or manga. Do not proceed unless you want to be spoiled.

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 Brunhild Dukedom.


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LN Vol 08-12
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 silver hair and green eyes. When she first appeared in the series, she wore a torn apart white silk. She wears a green bow tie and indigo-colored vest over a white dress with black tights.


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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 a super sensitive taste bud[5].


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  • Crystal Twin Sword[6] - Lu received a twin sword made of crystal material from Touya. The swords are the same length as Yae's "Transparent Flower". Because it made of crystal material, the swords are lightweight and its durability is stronger than any material exist[7].
  • Waltraute[8] - Lu's exclusive Frame Gears which is a retrofitted raid type FG.
  • Sacred Ring[9] - 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[10].


  • According to the character introduction[11]:
    1. She is on good terms with Yumina Ernea Belfast.
    2. She is good at cooking.
  • Lucia wears Mars Astronomical Symbol on her bow-tie.
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. Web Novel Arc 31 Chapter #448, Lucia married to Touya.
  4. Web Novel Arc 13 Chapter #99, Lu registered at the Alephis City's Adventurer Guild.
  5. Web Novel Chapter 29 #405
  6. Web Novel Arc 16 Chapter #114.
  7. Web Novel Arc 16 Chapter #114, Touya mentioned crystal material properties.
  8. Web Novel Arc 27 Chapter #274.
  9. Web Novel Arc 31 Chapter #449.
  10. Web Novel Arc 31 Chapter #449.
  11. Web Novel Chapter 26 #250


Brunhild Dukedom
Monarch: Touya Mochizuki  •  Linze Silhoueska  •  Elze Silhoueska  •  Yae Kokonoe  •  Yumina Ernea Belfast  •  Leen  •  Sushie Ernea Ortlinde  •  Lucia Rea Regulus  •  Hildegard Minas Lestia  •  Sakura
House of Mochizuki: Karen Mochizuki  •  Moroha Mochizuki  •  Kousuke Mochizuki  •  Sousuke Mochizuki  •  Karina Mochizuki  •  Suika Mochizuki  •  Takeru Mochizuki  •  Regina Babylon  •  Paula  •  Laim  •  Lapis  •  Cecile  •  Renne  •  Julio  •  Claire
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Alliance: Kingdom of Belfast  •  Kingdom of Mismede  •  Rifurisu Empire  •  Regulus Empire  •  Ramisshu Theocracy  •  Kingdom of Lihnea  •  Lestia Knight Kingdom  •  Federation State of Rhodomea  •  Xenoas Demon Kingdom  •  Eashen
Locations: Silver Moon Inn  •  Fashion King Zanac
Group: Babylon Sisters  •  Four Divine Beasts  •  Bride Conference  •  Elite Four