Tatsumi's voice draws Japan's attention enough to cause him to whirl around, sword held in front of him. Still defensively, but there's a bit more aggression to it. Even while seeing this coming, it was another story to deal with it.

"Tatsumi-san..." He does sound angry, but he tries his best to keep in controlled, frowning at the werepire. "Stop this immediately! I will be forced to take action if it is necessary to help America-san..."

He says that, but he's still standing quite still, hoping who he considers a citizen will just give it up. Unrealistically, but...