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|Base of Operations||Scepter 4 HQ|
|Novel Debut||K SIDE:RED|
Gen Shiotsu (塩津元, Shiotsu Gen) is a former member of Scepter 4.
He wears a uniform typical of the Blue Clansmen. It consists of a white shirt tucked underneath a closed, blue overcoat with prominent black and gold-colored lining. Below the waist, he wears dark blue pants and knee-high, low-heeled black boots with metallic plates attached to the nose and end.
He is rather tough and strong-willed. In contrast, he also cares a lot and worries for the Minato Brothers, Akito and Hayato Minato. Letting them go to school and worry about their future. He also requested HOMRA to take care of the Minato Brothers in Lost Small World when in pursuit of SCEPTER4.
He was left hand-man and Ex-Clansman of Jin Habari, and came to control of Scepter 4 after Jin was slain and Gōki Zenjō left. He aided the Gold Clan's Strain Research Facility with Kōshi Mizuchi and was the one who decided to disband Scepter 4 after the facility was destroyed.
Gen went for a drink at HOMRA, where he discussed with Izumo Kusanagi about the well-being of the Minato Brothers. After reaching home, the Minato Brothers informed him about their career choices, shocking him that they decided to choose different paths but he was glad that they were able to leave Scepter 4 behind them and move on.