Killy

Killy is the enigmatic main protagonist of BLAME! by Tsutomu Nihei. Armed with the mighty GBE, he is a provisional Safeguard unit tasked with finding the Net Terminal Gene, which, if found, would be able to halt the expansion of the City, thereby saving all human life within it from hostility by the rogue Safeguards. Killy's journey throughout the City and his encounters with its inhabitants make up most of the series.