In the level Two Betrayals, after the first pulse generator, in the room where you first fight flood in that level, there is a zealot. (Gold Elite)
This is his alternate story.
Two minor Elites fired their plasma rifles at the upcoming parasite. The Flood, in response, fired their taken assault rifles. The Elites, being slightly smarter, knew to keep moving, lest they be caught in the crosshairs. Still, in those close quarters it was quite difficult.
The Zealot in charge of this sector faced a serious dilemma. Coming up the ramp leading to Halo control center were a wave of Flood, determined to infect his troops. And even worse, more of the parasites were entering the room via the adjourning doorway.
He barked an order to a Major grunt. He told him to set up deployable covers on the small walkway that linked the two sides of the room together.
He knew that wouldn't keep all of the Flood out.
But he hoped at least the carrier forms would be stopped.
The infection forms could jump the ledge, and the combat forms would simply tear down the cover.
The grunt finished rather quickly, considering how scared he was. He probably knew.
Knew that they all probably wouldn't survive.
Just before the cover went up, the Zealot ordered his troops to pull back towards his side of the room.
But it was too late.
A minor Jackal desperately ran for it, but was gunned down by a human combat form.
Two major grunts screamed and yelled as infection forms grabbed onto them, and slowly wore away at their strength. Finally, they collapsed, dead.
The Zealot had a plan.
While the two rookies kept the flood contained on the other side, he would kill any Flood that attempted to cross.
But his train of thought was cut when he heard an elite scream.
He turned and saw one the minors take one too many hits from the human weapon, and he went down.
The other Elite, his shields already down, also fell under the fire.
The Zealot yelled in anger and charged toward the Flood.
As he was about to kill them, he realized his mistake.
By abandoning his plan to support this flank, he left only the grunt to stop the other side.
He turned to see the Grunt desperately fire his needler; manage to kill one combat form, before the Elite heard a horrible snap as the Parasite broke the Grunt's spine.
With him and the two surviving jackals left he ordered them to fall back into a corner.
One of the Jackals was too slow, and was torn apart by an eight-gage shotgun blast.
Under heavy fire, the remaining Jackal fire his plasma pistol a few times before being hosed with plasma.
The Zealot backed into the corner, and knew it was over.
He fired his weapon till it overheated.
He was in the process of reaching to side doing something with an object, when the Flood took him down.
Infection forms ran over to claim this new food when they heard something.
Something sizzling.
A combat form flipped him over, and revealed a ignited plasma grenade.