anime, grim reaper demon bounty hunter character, ageless, underworld mythology, none, full body view, with a skeletal undead form, ominously descending with scythe raised, empty hollow eye sockets, flayed desiccated flesh, ethereal shroud and clawed phalanges, dark tattered robes, foot-wrappings, horned skull, wearing chains and soul fragments, surrounded by swirling souls and spirits, emanating an intimidating unholy aura, spectral ghost dimension environment, ghastly green ghostly glow