Tatsumori Yatsumada

Tatsumori Yamada (山田 竜守) is a transfer student from AGHS to Subaruboshi High School. He is also the Aries Zodiarts, a Horoscope with terrifying abilities, who had evolved from a normal Zodiarts.

Personality
Like Kijima, Tatsumori looks more innocent then he actually is. He appears to be a well-spoken and mild-mannered. Underneath the surface, he is a psychopathic control freak, and will punish anyone who does not follow him.

Abilities
As the Aries Zodiarts, he has the power to put people into comas, and is alternatively referred to as "the Apostle of Sleep" (眠りの使徒, Nemuri no Shito). This works both ways, as he can also pull people out of comas, hence why Ryusei Sakuta is desperate to find him.

His powers also apply to inanimate objects, such as deactivating Fourze's Astroswitches.

Etymology
His given name literally translates into "dragon guard", referring to the dragon guard that had guarded the Golden Fleece until it was lured to sleep by Medea as so the Greek hero Jason could steal it during the time of the Argonauts.

Trivia

 * Tatsumori is played by Kazuma Kawahara, who had previously played Mutsuki Kuroba from Kamen Rider Decade's Blade Arc.