After development of the Proto-Tyrant (T-001 Type) was cancelled close to completion due to its defects, its data was collected and further research and development began on another model which would resolve previous imperfections. After administering the t-virus variant for Tyrant creation to another test subject, the research team led by William Birkin was able to significantly refine the T-002, ensuring that the t-virus did not act to the full extent of its power and erode the subject. They successfully preserved a sufficient level of intelligence for following and executing commands. It displayed a high measure of perfection with combat abilities and was officially christened "Tyrant", the official name of the t-virus and its development project, as a symbol of the power it exhibited a