Cayde-6

"Saddled with Tower duty, Cayde-6 dutifully advises and arms Hunters who seek him out."

Cayde-6 is the Vanguard for the Hunter class. He is located in the Tower and sells Hunter armor, emblems, and Vanguard armor. All Guardians can purchase and own these items regardless of their class, but only Hunters can equip Hunter armor.

Trivia

 * Cayde-6 is voiced by Nathan Fillion, famous for his role of Mal Reynolds on the cult space-western TV show Firefly.
 * Fillion also voiced the character of Edward Buck in Halo 3: ODST and Halo: Reach, two of Bungie's other games.