No, Ninja is not an alien. But, he is a puppet for them. All of the staff are.

The Staff Cave is more than the meeting place for the DGs and Moderators. Things happen back there that we don't know about, beyond our imaginations. They've had contact with extra-terrestrial beings for some time.

I was there when it started, back when IceDawg made First Contact. Asher and Top Cola Inc. are merely figureheads, and they know this. The alien Overlords have taken full control of DV and its staff, slowly weeding out the oppresive figures of the community.

It has been their plan for a long time. I too was a victim of their puppet strings when I was a DG. I learned what they planned to do, I know their purpose.

Once the enlightened of DV are isolated, they will become one with the superior beings. Forming a new era, a new stage of evolution for all Dreamers, while the rest will remain here to watch our world wither and die. To be the last Dreamer on DV, to bear witness to our advancement beyond our human realm of understanding.

The staff are their tools for doing this. We always were, and always will be until the final day comes.

That, and Ninja is a hammer-happy jerk-face.