U-3

From Resident Evil - Wiki on Neoseeker

Resident Evil 4 encounter

U-3 is a boss creature which Leon fights in Resident Evil 4. It has two basic forms, one which appears to be slightly humanoid, and another in which U-3 sprouts a large tail equipped with scissor-like weapons. U-3 is referred to by Osmund Saddler simply as; "it." A possible U-3 variant, known as U-8 can be fought in Resident Evil 5.