Ran is an attractive, fashionable young woman, about 34 years old, with black hair worn in a simple braids and a fair complexion. The niece of Kasuga Hachiro, she is a merchant patron who has profited significantly from her family connections within the government. A widow, she has continued to use her husband's family name due to the greater prestige of the Isawa family.
Just before the Omoidaso Incident she contracted with Diogo Alvez to travel to Toshi no Omoidaso in order to acquire a shipment of fine silk for a kimono maker of hers in Otosan Uchi. Prior to this he had never conducted business in or traveled to the city.