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Brunhild Dukedom (ブリュンヒルド公国, Buryunhirudo Kōkoku?) is a newly sovereign city-state in between the Kingdom of Belfast and Regulus Empire and being governed by Touya Mochizuki[1]. Later, the dukedom development is being managed by Masanobu Kousaka of the Four Heavenly Kings who is also the counselor of the dukedom. The land was given to Touya as a gift from both Regulus Emperor and King of Belfast while also serves as their form of alliance[2]. The duchy also host the World Alliance's monthly congress and sporting event.


Brunhild Dukedom is located on the south of the borderline between Kingdom of Belfast and Regulus Empire where 2/3 to the north of the border is occupied by Merishia Mountain Range (メリシア山脈, Merishia Sanmyaku?). Brunhild Dukedom area is about 410 square kilometers or according to Touya, is 2/3 the area of 23 ward of Tokyo City, which is 621 square kilometers.[1] The area is a fecund land but also featureless with only a single river flow through the land and a single highway strike from east to the west[3]. Before Touya Mochizuki claimed the land, it was bustling with demon beasts and bandits[4]. The highway is connecting Kingdom of Belfast on the west to Regulus Empire on the east. The highway is passing by the royal castle on the midway and has checkpoints on the both end[5].

The royal castle of Brunhild Dukedom is located in the middle of the country and the castle size is larger than the Belfast Mansion and surrounded by 2-kilometer-long-moat which water is coming from nearby river and is purified using Babylon's technology[2][6][7]. The idea of the royal castle was using Kingdom of Belfast's royal castle as the foundation which then adjusted according to the king's and his fiancées' (then wives) suggestion. The contractor for the building project was High Rosetta and she also utilized her Babylon, The Workshop, for finishing the project. The material came from an abandoned castle of the former feudal lord at the northern Regulus Empire and the construction was completed in three days[2][4][8]. The castle has defense facilities which consisted of rampart and side towers along with guard station. It also has large garden with a large fountain in the middle and two training fields which one located on the back of the house and the other located underground[6][9]. The castle is a 2-story building with interior that resembles Kingdom of Belfast's castle interior and the castle has been enchanted with 「Protection」[6].

The eastern area of the land is dedicated for agriculture which mostly rice fields[5]. The rice seeds that being used are the improved quality version of the Eashen's rice, like plague resistant and more fruitful, which are produced by The Alchemy Building[10].

The population in Brunhild Dukedom is mostly coming from Eashen immigrant. The Eashen immigrant is composed of 67 people (including children), who are actually ninjas, from Tsubaki's clan and also about 50 people which are Four Heavenly Kings and their subordinates[11][5]. After the Knight Order recruitment, 22 new immigrant came to the dukedom, they are 17 beastmen and 5 demi-humans[7]. Even though most the citizen come from Eashen, the resident houses and commercial building have western style architecture[12].

The economy of the country is based on its specialty product which is bicycle[5]. Masatoyo Naitou of the Four Heavenly Kings is responsible for the economy management of the dukedom. The dukedom shopping district, which is located on the highroad, is flourish with coffee shops, bicycle shops, weapon shops, armor shops, and tool shops[12]. Later, when the dukedom expanded its territory using transitional gate, vendors lined off in front of the gates that sell various types of equipment and objects for the adventurers exploring the dungeons (compasses, potions, canteens,emergency rations,etc.). There is also a former Takeda ninja (and subordinate of Tsubaki) who undercover as stall vendor to keep an eye on any disturbances that occur near the transfer gates as well as supplies information to Touya[13].

There is also a clock tower that was installed in the central plaza of the castle town. It is divided into twelve parts all of which are written in the ancient Paruteno language. It is enchanted with light magic to allow it to be seen in the nighttime as well. It is considered to be similar in appearance to Big Ben in London.[14]

Family Tree of The Monarchy

Note: ‡ current monarch; ♥ wife


Knight Order


Before the Knight Order of the Dukedom was created, Touya Mochizuki employs 3 former soldiers of Kingdom of Mismede, Rain Netherland, Nikola Strand and Norn Siberia who were receiving recommendation from Leen and approval from Yumina Ernea Belfast as the first law enforcer of the country [6]. These three recruits then become the leader of the Knight Order with Rain as the commander and both Nicholas and Norn as the vice-commander[15]. Nobuharu Baba and Masakage Yamagata of the Four Heavenly Kings are moving to the dukedom and then employed as the battle instructor of the knight order[5]. The knight order is composed of 15 former soldier of Shingen Takeda from Nobuharu Baba's subordinate, 15 former soldier of Shingen Takeda from Masakage Yamagata, 10 former shinobi of Shingen Takeda including Tsubaki for the spy unit, and 64 newly recruited soldier which 22 of it come from beastman and demi-human[15][7].

The knight order of Brunhild Dukedom is equipped with armor which is made from mithril and also weapon, its sheath, and shield which are made of phrase fragment and enchanted with 「Gravity」 to minimize its weight. Because of the crystal like weapon and shield, the Brunhild Knight Order is also known as The Crystal Knight Order[9].


  • Qualification[15]:
    1. Do not have criminal record.
    2. There is no limitation regarding gender, age, and race.
  • Selection Step:
    1. Registration and stamp number picking[15].
    2. Perseverance Test[7].
    3. Fighting Skill Exam[7].
    4. Interview[7].

Frame Gears

Main article: Frame Gears

Frame Gears are single-piloted giant mobile robot which were designed by Regina Babylon to combat the Phrase.


  • Fashion King Zanac - Brunhild Branch[12]: a boutique which sell exotic style fashion and owned by Zanac Zenfield.
  • Silver Moon Inn - Brunhild Branch[12]: an inn which has hot spring public bath. The water for the bath is being enchanted with 「Recovery」 and 「Refresh」. Micah is the branch manager.
  • Strand Trading - Brunhild Branch[10]: a trading branch office which headquarter located at Kingdom of Mismede. Owned by Olba Strand.
  • Adventurer Guild - Brunhild Branch[16]: an adventurer guild branch office located on the west side of the country. It has a tavern next to it. The guild master of this guild is an elf called Rerisha Mirian.
  • Transition Gates - Amaterasu, Tsukuyomi and Susanoo[13]: a set of three transfer gates that led to three separate dungeons that are mostly used for bringing in adventurers for both the country and the guild. The number and types of monsters that appear in each dungeon differs in each one.
    • Amaterasu : it has more magic beasts than the other dungeon.[13]
    • Tsukuyomi : it has more undead monsters than the other dungeon.[13]
    • Susanoo: it has more normal monsters than the other dungeon.[13]
  • Brunhild Hospital[13]: Due to increase of adventurers and travelers coming through the Brunhild Dukedom Touya builds a hospital where the dungeon explorers can go to treat their wounds and injuries. The hospital itself is manned by recovery specialist who can use light attribute healing magic as well as doctors who can diagnose and treat different illnesses and injuries. The prices for treatment differs but is free for children 13 years or younger.[13]
  • Brunhild School[17]:



  1. 1.0 1.1 1.2 Web Novel Chapter 13 #98
  2. 2.0 2.1 2.2 Web Novel Chapter 14 #100
  3. Web Novel Chapter 13 #99
  4. 4.0 4.1 Web Novel Chapter 14 #102
  5. 5.0 5.1 5.2 5.3 5.4 Web Novel Chapter 15 #109
  6. 6.0 6.1 6.2 6.3 Web Novel Chapter 14 #103
  7. 7.0 7.1 7.2 7.3 7.4 7.5 Web Novel Chapter 17 #124
  8. Web Novel Chapter 14 #101
  9. 9.0 9.1 Web Novel Chapter 17 #125
  10. 10.0 10.1 Web Novel Chapter 15 #113
  11. Web Novel Chapter 15 #108
  12. 12.0 12.1 12.2 12.3 Web Novel Chapter 15 #110
  13. 13.0 13.1 13.2 13.3 13.4 13.5 13.6 Web Novel Chapter 22 # 187
  14. Web Novel Chapter 24 # 215
  15. 15.0 15.1 15.2 15.3 Web Novel Chapter 17 #123
  16. Web Novel Chapter 16 #114
  17. Web Novel Chapter 24 # 236
  18. Web Novel Chapter 27 #281


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