- "A Prince that dares to brandish his sword against God."
- — Ashy
|Slayer | Prince|
"Ashen Prince that Defied Heaven" (天国に逆らう灰色王子, Tengoku ni Sakarau Haiiro Ōji)
|Base of Operations||
To Be Named Father and Mother
To Be Named Sword
Reiner (レイナー, Reinā), born Raymond Grayheart (レイモンドグレイハート, Reimondo Gureihāto) is the current Prince of the Ecclesiocratic country of Seven. Following the departure of one of the Seven Gods of Fortune that stabilized the country and the invasion of Niflheim into the country's socio-political framework, Reiner temporarily abandoned his position knowing full well his father and the head of the Grayheart Family was incapable of resolving the situation. In only a short amount of time, Reiner had mastered Baptism God Slayer Magic and had fought the God Kuvera to a stand-still before the said deity fled to Fiore. In an attempt to bring the said deity back to his position within Seven through reincarnation, Reiner has since taken up living in Mercurius: the place of his last sighting. Due to the selfless efforts he has taken to bring his country back to prosperity, he has been hailed as the "Ashen Prince that Defied Heaven" (天国に逆らう灰色王子, Tengoku ni Sakarau Haiiro Ōji), a well-deserved title.