A subgroup of Lymphocyte white blood cells, depicted as the special forces of the Lymphocyte army in Hataraku Saibou. The T cells, along with the NK cells, form a squadron.
Their uniform typically consists of an all-black military uniform with short sleeves. Some members may wear helmets and bulletproof vests, but most will often wear fatigues.
The most prominent Killer T squadron member is a muscular blonde-haired man.