Who exactly is this guy supposed to be?

Horse404 said:

Who exactly is this guy supposed to be?

One of known foreign-born Samurai. First assigned with an Italian Jesuit Alessandro Valignano who visited parts of the East Africa, East and South East Asia during its Jesuit missionary visits. He would later serving as one of Oda Nobunaga's retainer in 1581 and 1582

Seeing both FGO and Yasuke tags in the same line really had me go !" for a sec.