Hunters (Mgalekgolo) are worms! Collection of worms held together by dark magic! Never would I have imagined so, just from game play.
I still don’t know how they put on their armour and wield weapons.
Grunts (Unggoy) are as tall as average humans! I like grunts, they are my favourite covenant species, and I’ve imagined catching & domesticating one of them. However, standing at 5 feet 6 inches, they are not as small as Halo gameplay led me to believe!
Ghosts are bikes? I could be wrong about this one. However, I think I heard an elite refer to my ghost as a bike in Skirmish at Darkstar Warzone FF.
I always imagined the ghosts are like star wars land speeder.