Kasumi Alpha (カスミ・アルファ, Kasumi Arufa, stylised as Kasumi α), also known simply as Alpha, is one of the many clones of Kasumi that debuted in Dead or Alive 2.
Created by Victor Donovan and the Dead or Alive Tournament Executive Committee, Alpha was a product created during the early stages of Project Alpha, a science experiment with the aim of creating the perfect fighter and human-weapon. She was later transformed into the inhuman creature Alpha-152 as part of Project Alpha-2.
As a perfect clone of Kasumi, Kasumi Alpha looks just like her: a slender, physically-fit teenage girl of average height, with a round face, small facial features, and wide brown eyes. Her copper-coloured hair is worn loose.
The clone wears a pink body suit, with a matching scarf around her neck, and dark-pink boots, sleeves and sash around her waist. Kasumi can also wear this outfit in certain games, so to avoid confusion, when the real Kasumi wears the pink suit, Alpha's suit turns to black.
Although she is a perfect physical clone of Kasumi, Alpha doesn't share the same compassionate, friendly nature of the original. She seems to act like a misguided child with too much power, and acts immature and irreverent to anyone other than Donovan, whom she looks up to as a father figure, and Hayate, who she sees as her brother.
Although childish, Alpha has a very wicked edge to her: for example, her obsession with Hayate makes her go as far to free Kasumi from her cell with the sole intention of killing her so she could have Hayate all to herself. Just before Kasumi fought her, Alpha gave out a menacingly amused laugh, sounding almost mad and evil, as Kasumi stood there shocked and distressed while she thinks the clone had done something to Hayate. She was also willing to fight Kasumi without a second thought, giving a smug grin as she did.
Alpha has shown a degree of being perceptive as well; when Alpha overhears Bayman, Helena, and Christie, she shows she isn't fooled when Christie claims loyalty to Donovan and thinks that she also wants him dead. Despite this, when Christie orders Alpha to capture Helena, she obeys without question.
The kanji used to spell the name Kasumi (霞) means "Mist", a light fog. "Alpha" (Greek: άλφα) is the first letter of the Greek alphabet, represented by Α (uppercase), and α (lowercase). In the system of Greek numerals, it has a value of 1. It was derived from the Phoenician letter "Aleph", meaning "ox". Both as a symbol and term, it is used to refer to or describe a variety of things, mostly for the first or most significant occurrence of something.
Despite being her clone, Alpha considers Kasumi her "sister". The clone is jealous of Kasumi because she believed that Kasumi was keeping Hayate all to herself, and wanted to kill her so she could have the man all to herself. Kasumi was infuriated when she found out that Alpha was her clone planned to take Hayate away, and sought out to destroy her imposter.