Kevin Karaki

"Got it memorized?"

 was one of the commanders in the SPARTAN-IV Program's Kilo Company, and was a former Special Tactics and Operations operative as well.

Mental Report
Kevin is wiser than he first appears, and carries more honor than his deadly and gruesome battle tactics seem to indicate: an enigma of seeming contradictions, Kevin's oddity is balanced by his care for comrades, and his constant (and oft annoying) friendly competitions with the other commanders, which have served to inspire such contests between the Spartans themselves