Killy (霧亥 Kirii) is a fictional character from the manga series Blame!, by Tsutomu Nihei.
He is tasked by an unknown agency with finding a human in the 32-AU radius Megastructure who still possesses the Net Terminal Gene, a genetic marker necessary for safe access to the Netsphere, from which the functions of the Megastructure may be controlled. He is equipped with a Gravitational Beam Emitter (GBE), a compact but powerful weapon capable of creating holes miles long in the Megastructure. He is soon joined by Cibo in his quest.
Looking to be in his early to mid-20s, he is a glum-looking person, never smiling (except madly when shooting on occasion) and has a slight slouch in his normal standing position, he isn't afraid to fight, and readily shoots the GBE. He also often shows superhuman strength and endurance, being thrown through solid walls and floors before standing right back up with no apparent injuries. The GBE is so powerful that he is flung backwards by its sheer power, often into walls and the ground, but he always gets up. Even in its lowest power, his arm jerks up and back from the force of it. During the encounter with the giant Safeguard outside Toha Heavy Industries, he fires at the Safeguard with the GBE at Level 4 Extra power level. The recoil from the GBE is so powerful that he is thrown back a considerable distance, his right arm badly broken and exposing bone and tissue. He heals very quickly, as well, recovering from more serious injuries much more rapidly than an average human. In the times when it's quiet, he injects drugs into himself in the forehead, and when he is low on power, he may inject it straight into his hand.
He has an electronic connector to create signals to stop Builders and to transmit information from one person to himself, and vice versa. He also has no memory of his past, or how he obtained the GBE. Killy distrusts Silicon Creatures on sight, and destroys them whenever possible; whether they are or are not hostile towards him or his objectives does not bear any weight on his judgement. In Blame!², however, he rescues Pcell (part of a new, relatively peaceful generation of Silicon Life) from the Safeguard, indicating either that his priorities have changed or that he no longer considers Silicon Creatures to be a serious threat.