Muramasa is a Japanese God who participates in the Apocalypse to claim the final spot in Ragnarok.

Unlike many of the other participants of the Apocalypse, who are known for being Gods of the highest ranks, hold imposing feats and towering strength, Muramasa is a newcomer and a greenhorn in the Heavens: he's a Tsukumogami, a God who was formerly a physical object that became a deity after reaching his 100th birthday. His reason for his participation in Gods' Apocalypse is to achieve his currently unknown dream.