Shirasu Kinjou

Age: 25
Birthdate: April 1
Height: 175 cm
Weight: 65 kg
Blood type: O

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.

It is later revealed that he is the 10th generation head of the Fuuma clan. His real name is Kotarou Fuuma.

The Fuuma clan works for the Orochi. Shirasu pretended to be wounded so that he could be assimilated into the Kumo family and closely monitor the Orochi's candidate vessels. Later on, he turns against the Kumo brothers and returns to his clan.