The Kumo family housekeeper and Tenka's closest friend. Despite his polite and gentle exterior, he is a former ninja of the now-extinct Fuuma Clan, and possesses deadly skills in combat. He enjoys making sweets, but is quite atrocious at making savory dishes.
10 years ago, Tenka found him badly injured and carried him to a doctor. Since then, Shirasu has been living with the Kumo family.
