Cousin of Date Masamune, second-in-command of Sendai-han, eldest son and heir of Date Sanemoto and the daughter of Date Harumune (who were originally uncle and niece). He entered Date Masamune's service from childhood and was later decorated for his role in many of the clan's wars.

In 1595, due to dissatisfaction over reward for the Imjin War, Shigezane left Masamune and fled to Mount Kouya.

In 1600, during the Battle of Sekigahara, Uesugi Kagekatsu offered Shigezane an exorbitant reward to become a vassal of the Uesugi Clan, but he refused, saying "I would never serve a vassal house." (Uesugi Sadazane, the last of the Uesugi Clan bloodline to be lord of Echigo, once wanted to adopted Shigezane's father, but the Date Clan refused. If the adoption had taken place, Shigezane would have become the lord of Echigo after his father, and Kagekatsu, as one of the Nagao Clan, would have been a vassal under Shigezane's service.)

Shigezane returned to Masamune's service in autumn of 1600, and later served in the new Shogunate in important roles.

Shigezane's prowess in battle was acknowledged by various daimyo of the age. (He was called 'Date Shigezane the Brave', and he, along with 'Katakura Kagetsuna the Wise', were named 'the twin jewels of the Date'.) He also wrote a famous history of Date Masamune, called the 'Shigezane Chronicles'.

An information trader and spy, 'Puppeteer' Heishirou is thickset with a somewhat comical appearance. Though not a member of the Red Whales, he's invaluable for the news he brings back from the country outside of Shikoku. He is especially close to Nakagawa.

Head of the Muroto corps, he led the Muroto navy in his lifetime. He is described as cool and impassive. Kada Reijirou makes him second-in-command to Takaya.

Deputy head of the Red Whales, Reijirou is described as having slanted eyes and a strong-willed, harsh expression—not unlike that of a bandit. He was a member of the Ichiryou Gusoku. He appears to be more spiritually-sensitive than Kusama.

A member of the Red Whales commando unit serving under Takaya.

A member of the Red Whales commandos serving under Takaya, formerly of the Muroto corps, who sexually assaults Takaya along with Miyagi and Nobe in the belief that it would allow their former commander Hyoudou Hayato to assume command of the unit.

The leader of the Tosa Red Whales, whose demeanor is described as "deeply serious and sincere". He wants to resurrect Chousokabe Nobuchika to lead the Red Whales'.

A member of the Red Whales commandos serving under Takaya, formerly of the Muroto corps, who sexually assaults Takaya along with Nobe and Kubuki in the belief that it would allow their former commander Hyoudou Hayato to assume command of the unit.

A young man who befriends Takaya while backpacking in Iya. He lost his memories after falling off a cliff five years ago. His name was given him by the doctor who treated his amnesia, Dr. Mutou. His first name, Ushio, means "ocean tide". He likes photography and fishing, and is friendly and outgoing.

Takaya recognizes that he is kanshousha, and because of that he is hounded by the Tosa Red Whales to join their group.

The Red Whales' doctor, who mainly treats spirits and succeeds in creating medicine and contact lenses to suppress Kihachi's poison. He is described as a thin delicate-looking young man with a gentle personality. He and Kusama Seibee come from the same village. He also serves as the Red Whales' spymaster.

A member of the Red Whales commandos serving under Takaya, formerly of the Muroto corps, who sexually assaults Takaya along with Miyagi and Kubuki in the belief that it would allow their former commander Hyoudou Hayato to assume command of the unit.

A member of the Red Whales who was fifteen or sixteen when he died. A poor country samurai who couldn't afford food or clothing, Utarou joined the Tosa Imperialism Party as a very junior member at the end of the Tokugawa Shogunate (Bakumatsu era) and looked up to Takeichi Hanpeita. He attacked a high-ranking samurai who rode his horse carelessly through Utarou's family's fields, killing their crops. The samurai killed Utarou when Utarou's sword broke.