Tatsumori Yamada

is a 3rd year transfer student from AGHS to Subaruboshi High School. He is also the , a Horoscope with terrifying abilities, who had evolved from the .
==History==
Yamada began as a transfer student at SBHS who was originally a quiet member of AGHS's drama club. However, upon arriving to Subaruboshi High, Yamada used the Zodiarts Switch he obtain to become the Lepus Zodiarts before evolving into the sixth member of the Horoscopes, the Aries Zodiarts. He abuses his ability to put people to sleep and developed a god complex, to the point of totally disregarding the Horoscopes' interest in general.
Yamada transfers to Subaruboshi High to break away from the director's scrutiny, and took on the title of "The Apostle of Sleep" as he gets the entire school under his control and has everyone act in the roles he assigns them. Though Ryusei was only looking for the Aries Zodiarts under Tachibana's orders initially, he now sees a way to save Jiro in the said Zodiarts.
As a result, against Tachibana's orders, Ryusei decides to make a deal with Yamada, by killing Kamen Rider Fourze, to save Jiro. He was later defeated by Kamen Rider Fourze in Cosmicstates and his Switch was taken by Virgo. He is last seen in a hospital, ironically in a coma.
==Personality==
Like Kijima, Tatsumori looks more innocent than he actually is. He appears to be well-spoken and mild-mannered. Underneath the surface, he is a psychopathic control freak, and will punish anyone who does not follow him.
He treats Subaruboshi High School as his theatrical troupe, as he decides the casts and story, and anyone who defy him will be put to sleep. He have no interest in joining the Horoscopes and just wants to rule over Subaruboshi High School, as this is the place where he was evolved into the Aries Zodiarts. Tatsumori is also manipulative, bribing Ryusei Sakuta with a deal to save Jiro Iseki if Ryusei kills Fourze.
==Forms==
==Behind the Scenes==
===Portrayal===
Tatsumori Yamada is portrayed by , who previously portrayed Mutsuki Kuroha/Kamen Rider Leangle from Kamen Rider Decade's World of Blade arc.
==Etymology==
The kanji that make up his given name translate into "dragon guard", referring to the dragon that had guarded the Golden Fleece (the basis of Aries), until it was lured to sleep by Medea, as so the Greek hero Jason could steal it, during the time of the Argonauts.
==Notes==
*Tatsumori's sleep-based special ability, not to mention his Zodiarts form's animal motif, refers to the idiom "counting sheep".
*His defeat by Gentaro is poetically karmic. He used his powers as the Aries Zodiarts to put his enemies to sleep and go so far to manipulate Ryusei into killing Gentaro, which ultimately leads to his defeat by Fourze Cosmicstates, ironically leaving him in a coma.
*The Pink Rabbit Imagin suit was re-used to represent the Lepus Zodiarts.
==Appearances==
* Kamen Rider Fourze
**Episode 30: Senior, Useless
**Episode 31: Subaruboshi Kingdom 
**Episode 32: Super Space Sword
**Kamen Rider Fourze The Movie: Everyone! Let's Feel the Universe!
==Navigation==
Category:Kamen Rider Fourze
Category:Fourze Characters
Category:Horoscopes Switchers
Category:Zodiarts Switchers
Category:AGHS Students
Category:AGHS
Category:Sheep Monsters
Category:Rabbit Monsters
ru:Тацумори Ямада