I dont know the voice actor buuuuut...Cortana from Halo.
[spoiler]I would like my [quote]best idea ever[/quote] award to be mailed now.[/spoiler]
English
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Guardian,Archon Of Light
Blade Of The Traveler - old
Jen Taylor ,she is on there And it might be a possibility for the future since Microsoft said they will be working with Bungie again If not the ghost, then an NPC of some sort , but I would be surprised if Bungie doesn't find a way to bring her in to the Destiny universe.