Halo Flood 4

Ashamed by the ignominy of it, but consistent with his orders, the Elite named Isna 'Nosolee waited until the Grunts, Jackals, and two members of his own race had charged out through the human air lock before leaving the assault boat himself. Though armed with a plasma pistol, plus a half-dozen grenades, he was there to observe rather than fight, which meant that the Elite would rely on both his energy shielding and active camouflage
to keep him alive.

His role, and an unaccustomed one at that, was to
function as an "Ossoona," or Eye of the Prophet. The concept, as outlined to 'Nosolee by his superior, was to insert experienced officers into situations where intelligence could be gleaned, and to do so early enough to obtain high-quality information. Though both intelligent and brave, the Prophets felt that the Elites had an unfortunate tendency to destroy everything in their path, leaving very little for their analysts to analyze.

Now, by adding Ossoonas to the combat mix, the
Prophets hoped to learn more about the humans, ranging from data on their weapons and force deployments to the greatest prize of all: the coordinates for their home planet, "Earth."
'Nosolee had three major objectives: to retrieve the enemy ship's AI, to capture senior personnel, and to record everything he saw via the cameras attached to his helmet. The first two goals were bound to be difficult, but a quick check confirmed that the video gear was working, and the third objective was assured.

So, even though the assignment was empty of honor,
'Nosolee understood its purpose, and was determined
to succeed, if only as a means to return to the regular infantry where he belonged. The Elite heard the rhythmic clatter of a human weapon as a group of their Marines backed around a corner, closely pursued by a pack comprised of Grunts and Jackals. The Ossoona considered killing the hu- mans, thought better of it, and flattened himself against
a bulkhead. None of the combatants noticed the point where the metal appeared to be slightly distorted, and a moment later the spy slipped away.-Chpt.1 pgs.30-31