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Icon-fourze.png This article is about a villain in Kamen Rider Fourze.

Dark Yuki (闇ユウキ, Yami Yūki) is a physical manifestation of Yuki Jojima's darker emotions as well as the eleventh Horoscope, the Gemini Zodiarts (ジェミニ・ゾディアーツ, Jemini Zodiātsu), who had evolved past the Leo Minor Zodiarts form.

She is identical to Yuki to every way, the only physical difference between the two is that Dark Yuki normally wore a white expressionless mask on her face. However, when she starts to become the dominant aspect, Dark Yuki is able to discard the mask until Yuki regains herself.


Dark Yuki came into being when the Leo and Libra Zodiarts forced Yuki to activate a Zodiarts Switch. Due to the nature of evolution concerning a Gemini Zodiarts, only the dark aspects of her personality congregated into the newly created Dark Yuki.

Dark Yuki would then go on to do the things Yuki could only dream of: cheating Kengo out of a chance to see NASA, vandalize school property with space themed graffiti, and pushing Miu to a five foot drop. The Kamen Rider Club thought Yuki snapped until they found footage of Dark Yuki. The matter gets worse when it is revealed that Dark Yuki is becoming more real every minute while the real Yuki is slowly being erased from existence, taking over Yuki's life and tricking the Kamen Rider Club into attacking their now-masked friend.

With the original Yuki becoming less and less dominant, the Horoscopes began the ceremony of death and rebirth where Yuki would disappear forever. However, when Gentaro shows the ticket Yuki gave him to go to space with her when Gentaro moved away back when he was a kid, Yuki regained her face and Dark Yuki lost dominance.

Enraged, Dark Yuki became the Gemini Zodiarts, but the transformation did nothing to sway the weakening. While initially having an advantage over Fourze in Cosmicstates, the Rider used the Meteor Storm Switch after Ryusei threw it to him to absorb the Cosmic Energy of the Gemini's Supernova technique and one of her red cards, and later destroyed Dark Yuki with the Rider Super Galaxy Finish.

Her Horoscopes Switch was retrieved by Leo.

Video Game appearances

Kamen Rider Break Joker

Gemini Zodiarts Break Joker card

the Gemini Zodiarts appears as a playable character with other Riders and monsters in Kamen Rider Break Joker.


Dark Yuki

As the embodiment of Yuki's inner darkness and a Cosmic Energy clone, Dark Yuki is sadistic and calculating and acts on her other self's evil desires, having desired to quietly prank her friends or cheated in achieving her dreams. She also has a desire to replace the real Yuki in order to become more real.

Powers and Abilities
Memory Theft
Dark Yuki can steal the memory of the original Yuki, at the same time perfecting herself.
Peak Human Physicality
Dark Yuki was extremely agile in both performances either as a human clone or Horoscopes.

Gemini Zodiarts

Gemini Zodiarts

Gemini Zodiarts (cloaked)

  • Height: 218 cm
  • Weight: 182 kg
Powers and Abilities
Horoscopes can teleport themselves to any desired places.
Dustard Creation
Horoscopes can create Dustards from Stardusts.

Gemini Zodiarts Supernova

Supernova (超新星, Chōshinsei)
The signature power of Horoscopes, using this can either assume a more powerful form or gain a new technique. In Gemini's case, it allows the Gemini Zodiarts to produce a clone of herself.
Self Detonation
The Gemini clone can act as a living bomb.


Lynceus and Idas

Lynceus (リュンケウス, Ryunkeus)
Throwing red cards that explode on contact.
Idas (イーダス, Īdasu)
Throwing blue cards that are remote explosives that explode when she snaps her fingers.



Behind the scenes


Dark Yuki's physical portayal is portrayed by Fumika Shimizu ( 清水富美加, Shimizu Fumika) while she is voiced by Hiromi Konno (今野 宏美, Konno Hiromi).

As Gemini Zodiarts, her suit actor is currently unknown.


An alternate romanization of Yuki Joujima's name is "Yūki Jōsima", which is an anagram of "I am Sōjikyū". Sōjikyū (双児宮) is the term for "Gemini" in Japanese astrology.

Concept Art

Gemini Zodiarts concept art

Gemini Zodiarts was designed by Kia Asamiya (麻宮 騎亜, Asamiya Ki'a).


  • Gemini's motif is based on the Gemini constellation, a jester and a harlequin.
    • The harlequin is an ancient type of clown that is said to have inspired the Helliquin, a demonic black face, clown servant of the devil in certain plays, which makes sense giving Dark Yuki/Gemini's dark nature.
  • The Gemini constellation also represents twins, which is referenced by the fact that the one who first uses the switch creates a dark Doppelgänger of themself and how Gemini's Supernova ability lets her create a copy of herself.
  • The Gemini Zodiarts is a very subtle call to Kamen Rider Double: the outfit is two-toned in color, with black making up the left side, and the motif of Gemini being a jester and a harlequin.
    • The Zodiarts suit is also somewhat similar to the design of the Nasca Dopant suit.
  • Dark Yuki's evil affiliation regardless of regular Yuki's "good" affiliation refers back to her naming association with Joji Yuki/Riderman: he is the only Kamen Rider who was a member of a villain organization and worked with the villains (in his case, Destron) by choice as opposed to merely being abducted to fight them or forced to fight due to circumstances, having originally been a Destron scientist prior to his betrayal and heroic turn.


Icon-fourze.png Kamen Rider Fourze
Kamen Riders
Gentaro Kisaragi - Ryusei Sakuta - Nadeshiko Misaki - Kamen Rider Ikaros - Rider Hunter Boot
Fourze Driver - Meteor Driver- Nadeshiko Driver - Astroswitches - Astroswitch Case - Billy the Rod - Hee-Hackgun - NS-MagPhone - Meteor Galaxy - Barizun Sword - Meteor Storm Shaft - Machine Massigler - Machine Meteorstar - Powerdizer
Kamen Rider Club
Initial Members
Yuki Jojima - Kengo Utahoshi - Miu Kazashiro - Shun Daimonji - Tomoko Nozama - JK - Chuta Ohsugi - Ran Kuroki - Haru Kusao
5 Years After
Saburo Kazeta - Rumi Komaki - Daita Kondou - Chikao Nezu - Miyoko Ohki
Ishinomori Characters
Inazuman - XVII - Skydain - Groundain - Black Knight - Inga Blink
The Horoscopes: Sagittarius - Virgo - Leo - Libra - Scorpio - Cancer - Aries - Capricorn - Aquarius - Taurus - Gemini - Pisces

Zodiarts: Orion - Chameleon - Unicorn - Hound - Altar - Pyxis - Perseus - Lynx - Dragon - Pegasus - Cygnus - Coma - Musca - Hercules - Lepus

Stardust Ninja Dustards
Foundation X
Lem Kannagi - Katal - Solaris - Chancellor Kiima - Suddendath Beta
Xatan - Eel - Gahra