Quinol

"We call 'em boogeymen for a very good reason."

- UNSC Army Sergeant, 2535 Quinol, often referred to by UNSC soldiers as 'Boogeymen' or 'Stalkers' were a Covenant fringe species suited to hunting down and tearing apart small groups of infantry. The Covenant often fielded them in city sewer systems and underground tunnels as they proved highly effective in close-quarters. On several accounts they were able to infiltrate civilian transports during evacuation and wreak havoc. On many accounts a lone Quinol has managed to hunt and eliminate a team of up to ten UNSC marines and rival the strength of even a SPARTAN-II supersoldier. Due to difficulties in communication and their unreliable nature, the Covenant reserve trusted Quinol for major offenses and keep them as security on their most important ships. During the Great Schism they sided with the Sangheili and many died to protect their trusted allies.