hmmm... not sure about this. I'll probably forget heaps...
1. Probably Yayap.
2. The shipmaster elite missing half his jaw, I forget his name.
3. Captain Keyes (he'd be higher if I wasn't so angry at him for dying just before I get there after spending like all of Halo CE trying to save him). That was an awesome maneouvre (sp?) in "Fall of Reach." Unless it was "The Flood," but I'm pretty sure it was "Fall of Reach."
4. Kurt? The spartan 3 guy that survived from beta and wasn't muted by the experience? That main one from alpha? The spartan 2 that took on those hunters with melee near the end of "Ghosts of Onyx"? I forget all the names, and don't own a copy of the book so I can't look them up... Dr Halsey? Idk I've always had a soft spot for her.
5. One of the above?
Somewhere in there would be the marine in Halo2 that stays in the courtyard to fight the hunters with you in the level "outskirts." Also the gold elite in HaloCE on "the silent cartographer" that got his own cutscene. Those were awesome considering they were just NPCs with no character development. Killing that elite always made me sad...
Beware the Australian Fridge
Veraam:
One with power = Corruption
Two with power = War