Nagare

Nagare Tatsumi/Go Blue (巽 流水／ゴーブルー Tatsumi Nagare/Gōburū?) is the second son of the Tatsumi family and serves as their second-in-command.

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He belongs to the Capital City Fire Department Chemistry Division. Nagare spends much of his time looking out for his younger brother, Daimon, though Daimon often ignores his older brother's advice, a trait which often lands him in trouble. Nagare was once suspended because of and injury sustained by Daimon in a fight, despite the fact that he had advised Daimon against becoming involved in the confrontation. Since their youth, they have had a fractious relationship, with Daimon's wayward behaviour often getting Nagare into trouble. Nagare rarely responds to his older brother's chastising. Nagare is very protective of his family, and would sacrifice himself to save the Tatsumi family and the team. He is usually the most serious and intellectual member of the group; Nagare does not rush into a fight without knowing who he is facing. As a chemist, he developed the fire-fighting equipment in his department, as well as the human-sized robot Big Douser. He is 23 years old.