Riku is the mysterious financier behind Shikabaneya, the demon bounty-hunting outfit run by Jyuubei. Not much is known about his background, but he's the one keeping the money side of things running—basically the reason the operation can actually function. He works closely with Jyuubei, who handles the corpse-dealing side of the business, while Riku makes sure there's cash flow to support their hunters.
Content compiled by AnimeList.moe from publicly available sources.
