Kappus

Kappus was a United Nations Space Command Marine technical specialist.

He was featured in Halo: Combat Evolved as part of the squad that also housed Private's Manuel Mendoza, Bisenti, Riley, Jenkins, and Staff Sergeant Avery Johnson.

He was a Tech Specialist in Covenant and Forerunner technology. One of his tasks was opening locked doors. He was ordered by Captain Jacob Keyes to open the door that just so happened to be the only thing holding back the Flood. Unwillingly and unknowingly, Kappus unleashed the Flood on Installation 04, dooming him and the rest of his squad, save for Johnson. When an Infection Form attached itself to Kappus's friend, Riley, he got it off successfully. Kappus was soon transformed into a Combat Form, though.

Quotes

 * "Which is weird, right? I mean... look at it. Something... scrambled the insides." - When the dead Elites patrol was found, level 343 Guilty Spark.
 * "Yea... I dunno. Maybe there was an accident. You know, friendly fire or something?" - When Avery Johnson suggested that the Elite patrol may be killed by Plasma scoring.
 * "Naw, we just met."
 * "I'll try, Sir. But it looks like these Covenant worked pretty hard to lock it down." - To Captain Keyes, who ordered him to open the locked door in the level 343 Guilty Spark.
 * "Yes, Sir." - When Captain Keyes pushed him to open the door.
 * "Sarge! Listen!" - To Avery Johnson.

Trivia

 * His role in the game is often mistaken for that of Mendoza's.