Shirasu Kinjou

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.