In Halo 2 the game actually showed Cortana in person in her gray outfit but the Halo toy makers made her as a hologram. I wanted Cortana in person but ready for battle so I made a custom of her out of the SNK Mai and some modifications and walla she has come to life.
Cortana wasn't projecting herself through hologram until Master Chief saved her from the evil castle of Bowser, nor was she a hologram that made a wish for the Fairy Godmother to turn her into a real girl.
You should look up information on whatever you sculpt. Research could be beneficial when you want detail on a character, and (in this case) when you want accurate labeling. Nobody just makes a custom Power Ranger, get it mixed up with the "Power Ranger from the games", and label the Power Ranger as 'Master Chief'.
It's amateur and lazy. Good work on the sculpting. Although I do not recall any Halo character with that suit, it shows you do have excellent potential on sculpting figurines.