House Tengille appears in Final Fantasy Tactics and consists of three characters, all of whom are associated with the Church of Glabados and all of whom Ramza Beoulve must fight. The family is headed by Folmarv Tengille, leader of the Knights Templar, who has been possessed by the Lucavi demon Hashmal. Folmarv has a son, Isilud, who is also a Knight Templar though unaware of the Lucavi plot. Folmarv also has a daughter, Meliadoul, who ultimately defects to Ramza's company. Folmarv mistreats his children, striking Isilud across the face at Riovanes Castle, and ultimately kills him. When Meliadoul learns the truth, she fights Folmarv during the final phases of the game. Ultimately, Folmarv commits suicide while in the form of Hashmal.
In The Ivalice Chronicles, Isilud and Meliadoul denounced Folmarv as no longer their father; Isilud when he was mortally wounded during Folmarv's rampage as Hashmal in Riovanes, and Meliadoul during her final confrontation with Folmarv at the Mullonde Cathedral. Meliadoul names her brother Isilud as the current heir of House Tengille during her introduction to face Ramza at the Free City of Bervenia. Upon facing Folmarv's true form as Hashmal, Meliadoul is determined to avenge her brother and to redeem their family name by destroying him.