Characters in Black Wind

Dirk Pitt Jr.

A NUMA marine engineer and Dirk Pitt's son, making his debut as series lead here while he dives on a scuttled Japanese submarine and its wartime cargo.

Also in Arctic Drift, Havana Storm

Dae-jong Kang

A wealthy Incheon industrialist secretly advancing a North Korean scheme to strike the United States with a biological weapon recovered from the sunken submarines.

Tongju

An assassin carrying out a string of killings on Kang's orders, staged to look like the work of an unrelated terrorist group.

Dirk Pitt

Head of NUMA and the series' longtime hero, who joins the hunt for the lost WWII submarines while his adult children take the field lead for the first time.

Also in The Mediterranean Caper, Iceberg, Raise the Titanic!, Vixen 03, Pacific Vortex!, Deep Six, Cyclops, Treasure, Dragon, Sahara

Summer Pitt

A NUMA marine biologist and Dirk Pitt's daughter, twin sister to Dirk Jr., who is pulled into the search for the missing submarines alongside her brother.

Also in Arctic Drift, Havana Storm, Odessa Sea

Jack Dahlgren

A NUMA colleague and dive partner of Dirk Pitt Jr. who helps track down the wreck of the Japanese submarine I-403.