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They are part of Ten Master Clans, and are from the Second Institute, where the research focus was, "Direct Interference of Inorganic Substances", specifically the development of the oxidation to deoxidization branch of Absorption Type Magic. 
Mai, the current Head of the Futatsugi Family is a shareholder of multiple Chemical Engineering and Food Engineering Companies.
Area of Influence
The Futatsugi Family's influence encompasses specifically the Chūgoku region. During the Master Clans Conference held every four years, the Head of the Futatsugi Family gives a report on the status of the region they monitor.
- Family Head : Futatsugi Mai (二木 舞衣)
- Daughter : Futatsugi Yui (ニ木 結衣)