Mandetat was a human male who served the First Order as a technician on the Starkiller Base superweapon. He was one of the many personnel involved in the process of firing the weapon, manning a station in the primary fire control room of the base. He was present for the weapon's first use in destroying the Hosnian system where the New Republic Galactic Senate was located. He then took part in the preparations for the weapon to be fired at the Ileenium system, but the base was destroyed by the Resistance before the weapon could fire. While in the control room he wore a black Starkiller engineer duty uniform with static-grounded boots. Mandetat had brown hair and fair skin.