The term 'Last of the Greek Characters' refers to the letter OMEGA, which is the last letter in the Greek alphabet. OMEGA is represented by the symbol Ω and has a numerical value of 800. It is often used to represent the end of something, such as the end of a series or the end of a journey. In mathematics, it is used to denote the limit of a sequence or the supremum of a set. In physics, it is used to denote the ohm, a unit of electrical resistance.