Personally, I think he is an Awoken. The reason I say that is the way he talks. You know how some Awoken (if you picked a male Awoken as a character, they will have a slight British accent) have that slight British accent? He kinda has one. I don't have any other evidence, but I still have a feeling that he is an Awoken, but keep in mind, I might be wrong. Thoughts???
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He was confirmed as human in some post by Bungie or something.