Taichi Hiraga-Keaton's friend and business partner. Together they run a insurance investigation agency located in London. 

Taichi Keaton is a half-British half-Japanese archeologist and SAS veteran of the Falklands War. He solves mysteries and investigates insurance fraud for Lloyd's around the world. 
(Source: Anime News Network)

[Wiki (jp)](https://ja.wikipedia.org/wiki/辻親八)

Ross Douglas is a voice actor with Ocean Studios and has done voices on several shows including Black Lagoon,  InuYasha, and Mobile Suit Gundam

Taichi Keaton is a man of many talents: father, historian, frequent traveler, negotiator, archaeologist, former survival instructor, and all while working as an insurance investigator for Lloyd's of London. While his methods may seem a bit unorthodox, he gets the job done when needed, but not without a little something to learn or teach in the process. Through all of his adventures, some people call him a quack. Those who know him well call him a master of life... 
(Source: Anime News Network)

Taichi Hiraga Keaton, the son of a Japanese zoologist and an English noblewoman, is an insurance investigator educated in archaeology and a former member of the SAS. When a life insurance policy worth one million pounds takes Master Keaton to the Dodecanese islands of Greece, what will he discover amidst his scuffles with bloodthirsty thieves and assassins?
 
(Source: Viz Media)

Daniel O'Connell