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Leen (リーン Rīn?) is a 600-year-old fairy who also one of Touya Mochizuki's wife[10]. She was the tribal chief of the fairy tribe in Kingdom of Mismede[11][12] before becoming the court magician of Brunhild Dukedom[16] and the fifth queen of the Duchy[17]. She currently lives with Touya and Paula at Brunhild Dukedom. Since she is married to Touya, she joins the Mochizuki family and her name becomes Leen Mochizuki (望月リーン Mochizuki Rīn?). In addition, since she is the queen of Brunhild Dukedom, her name also becomes Leen Brunhild (リーン・ブリュンヒルド Rīn Buryunhirudo?).


This section is incomplete. Please help us by adding information to it.
Leen Anime.png
Leen's daily attire.
Leen Swimsuit.png
Leen in her swimsuit.

Leen is shown as a young woman despite her age, with silver twin-tails and gold eyes. Her young appearance is due to fairies maintaining a young appearance for their entire lives. However, Leen appears younger than the average fairy, something she greatly dislikes. She is usually wearing a lolita dress. The pin on the dress’s ribbon, the lines on its sleeves, and her necklace greatly resemble the astrological symbol of Mercury, reflecting a possible theme within Touya’s wives’ clothing.


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Leen’s main personality trait is her tendency to do things out of spite. Touya has noted that she derives sadistic pleasure from doing so (For example, she smiled maliciously when she threw Kansuke Yamamoto’s jewel artifact into a wall, despite the former begging her not to do so.) However, Leen also possesses a strong thirst for knowledge. This can be seen in her enthusiasm for discovering all 9 Babylon flying structures (she goes as far as forcing Touya to buy her underwear if he does not help her search). She is also quite perverted, as seen when she groped Tsubaki’s breasts while invisible and blames it on Touya.

However, upon marrying Touya and gaining an important position in the Bride Conference, these traits decrease, and she instead often chastises Touya for his seemingly perverted actions.


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  • Null Magic
    • Program: this magic allows Leen to set rules toward inanimate objects which is similar with the computer programming. This magic can be added into the same object infinitely.
    • Transfer: this magic allows Leen to transfer her Mana to the appointed receptor.
    • Protection: this magic allows Leen to protect certain inanimate objects from physical degradation and prolongs its lifetime.
    • Discovery: this magic allows Leen to find the intended object only based on the exact parameter. Based on the certainty principle, her magic can not be used to find a slightly different object.
  • Appraisal (鑑定 Kantei?) - As a "Retainer" (眷属 Kenzoku?) of Touya Mochizuki, her magical item appraisal ability is sharpened, and becoming her "Dependent Trait" (眷属特性 Kenzoku Tokusei?). [18].


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  • Grimgerde[19] - Leen's exclusive Frame Gears which is a blitzkrieg assault type FG.
  • Sacred Ring[20] - Leen 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.


  • "I can not believe this thing is actually happening in my life. That's what longevity can do, huh?" - Leen before her wedding kiss[21].


No speculations and rumors, just fun facts!
  • Leen wears the Mercury Astronomical Symbol on her dress, bow-tie, and umbrella.
Mercury Symbol on Leen's bow-tie.
Mercury Astronomical Symbol.
  • She possesses the most magic attributes among Touya's fiancees as well as most of the general populace except Professor Babylon and Touya.


  1. Web Novel Arc 18 Chapter #134,Leen told Touya about her age.
  2. Web Novel Arc 29 Chapter #405,It has been two years since Touya met her.
  3. First appearance height
  4. 4.0 4.1 Web Novel Arc 6 Chapter #45,Touya described her appearance as a girl with white hair and gold colored eyes. Cite error: Invalid <ref> tag; name "physicaldescription" defined multiple times with different content
  5. Web Novel Arc 22 Chapter #185,Leen has all magic affinity except Dark.
  6. Web Novel Arc 6 Chapter #45,Leen showed her program null magic.
  7. Web Novel Arc 5 Chapter #32,Touya learned transfer, a null magic that have been taught by Charlotte's master, Leen.
  8. Web Novel Arc 6 Chapter #48,Leen told Touya about her protection null magic.
  9. Web Novel Arc 24 Chapter #232,Leen told Touya about her discovery null magic.
  10. 10.0 10.1 Web Novel Arc 31 Chapter #448,Leen married to Touya.
  11. 11.0 11.1 Web Novel Arc 6 Chapter #45,Leen introduced herself as the chief of fairy tribe.
  12. 12.0 12.1 Web Novel Arc 22 Chapter #184,Leen retired as the chief of fairy tribe.
  13. Web Novel Arc 29 Chapter #389,Leen was the Mismede's court magician.
  14. Web Novel Arc 7 Chapter #54,Leen decided to stay at Kingdom of Belfast as an ambassador.
  15. Web Novel Arc 14 Chapter #103,Leen decided to stay at the Duchy of Brunhild as an ambassador.
  16. 16.0 16.1 Web Novel Arc 22 Chapter #184,Leen decided to become Brunhild's court magician.
  17. Web Novel Arc 32 Chapter #482.
  18. Web Novel Chapter 30 #442
  19. Web Novel Arc 26 Chapter #255.
  20. Web Novel Arc 31 Chapter #449.
  21. Web Novel Arc 31 Chapter #449.


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
Kingdom of Mismede
House of Mismede: Jamukha Blau Mismede  •  Glatz
Citizen: Olba Strand  •  Olga Strand  •  Arma Strand  •  Garn  •  Solum
Ex-Citizen: Leen  •  Paula  •  Lain Netherland  •  Nore Siberia  •  Nikola Strand
Related Articles
Alliance: Duchy of Brunhild  •  Kingdom of Belfast  •  Refreese Imperium  •  Regulus Empire  •  Ramissh Theocracy  •  Kingdom of Lihnea  •  Knight Kingdom of Lestia  •  Roadmare Union  •  Demon Kingdom of Xenoahs  •  Eashen