A submersible pilot and Onodera's colleague who sacrifices himself during an earlier attempt to detonate the warheads, paving the way for Onodera's successful mission.
Fellow submersible pilots working on the same national defense project.
Pilot attempting to deploy the scientist's proposed explosive system.
Minister overseeing the drillship operation that includes Tatsuya's submersible team.
Explore the full interactive character relationship map of Japan Sinks