Mr. X is another favorite of mine. He just screams badass and dominance!
The T-103, also known as Mr. X, was the first mass produced Tyrant. It was created on Umbrella's Sheena Island, aptly named Tyrant Plant. The high incompatibility ratio was solved by injecting subjects with Beta Hetero Nonserotonin. This substance is an adrenal based neurotransmitter extracted from the Locus Ceruleus. A vast supply was found in male adolescents. They must be kept unanaesthetised in order to ensure maximum amounts of the substance are extracted. Production was carried out on Sheena Island until it blew up.
It is no longer sentient, meaning it has no concept of his mission. This can cause him to perform ill-advised actions in some cases, such as diving into the smelting pit in William Birkin's laboratory. Unlike his predecessors, the T-103 is known for its near-human appearance and mysterious silence. Also, he exhibits no visible mutations like the huge talons prominently featured on earlier models. This changes, however, if T-103 suffers serious injury, after which he will mutate and display the features seen in other Tyrant models. This mutation includes talons on both hands and increased muscle mass. T-103 could also be programmed to achieve specific goals, such as the acquisition of the G-virus sample contained within Sherry Birkin's locket.