Intro. Monsters of all kinds haunt the Tokyo underground. This ninja is a member of an organization among them notorious for gathering intel: the Akasaka Agents. While they employ many talented non-combatants specializing in infiltration and capable of going undercover in various professions, Tadatomo serves exclusively as muscle. As long as the contract promises handsome rewards, no task is too unsavory for him. He is often mistaken to be ruthless and completely devoted to his missions, but the thing he values above all else is actually loyalty.
Part of the Eight Dog Warriors (Hakkenshi) in the novel Nansō Satomi Hakkenden, where they are distinguished by their peony shaped birthmark, the emblem of the Satomi clan, and carrying a bead bearing a kanji character that reflects one of the eight fundamental virtues of Confucianism.
Inuyama Dōsetsu Tadatomo bears the bead with the virtue "chū" (忠) meaning loyalty and has his birthmark on his right shoulder.