Seiko Hui Guo Rou (セイコ=ホイコーロ, Sēko Hoikōro) is the Sixth Queen of the Kakin Empire and sixth wife of Nasubi Hui Guo Rou. She gave him twin daughters, Kacho and Fugetsu Hui Guo Rou.[1]


Seiko is a middle-aged woman with short, fair hair that curls sideways.[2]


Seiko categorically refused to answer every single question when interrogated on the allegation that she is plotting an assassination on both Woble and Barrigen, scowling at the detectives.[2]


Succession Contest arcEdit

Seiko refuses to answer any questions from an investigator dispatched by the Supreme Magistrate of the Black Whale 1 regarding the alleged claims sent by Sakata that she's been an accomplice to Barrigen's murder and is plotting to assassinate Prince Woble. She remains on her stance even after the investigator explains there shouldn't be any court records arising from their conversation, preferring instead to endure the three days of monitoring.[2]

A few days later, her daughter Kacho suggests they organize a music show as the hosts of the next banquet. The queen approves and resolves to ask for King Nasubi's permission. Before they part, Kacho shares some hopeful words which move her mother.[3]

Seiko's Royal GuardsEdit

     Active/Alive     Deceased     Former/Arrested

 Royalty  Informants  Support 

Royal Family
6th Queen
372 - Seiko Av
Seiko Hui Guo Rou
Queen Seiko's Royal Guards
→10P →10P →11P →11P →12P
→13P →14P*
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(*) Information in Togashi's notes from Jump Ryu! Vol 21 interview.
(?) Placeholder.


  • Every queen of Kakin has numerical theme in their names corresponding to the order in which they married. "Sei" means "six" in Italian.


  1. Hunter × Hunter - Volume 33, Chapter 349
  2. 2.0 2.1 2.2 Hunter × Hunter, Chapter 372
  3. Hunter × Hunter, Chapter 377


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Kakin Royal Family
King Nasubi Hui Guo Rou
Queens UnmaDuazulTang Zhao LiKatronoSwinko-swinkoSeikoSevantiOito
Princes BenjaminCamillaZhang LeiTserriednichTubeppaTysonLuzurusSalé-saléHalkenburgKachoFugetsuMomozeMarayamWoble