I would say interdimensionals with an enormous amount of time on their hands. Said interdimensionals at times pretend to be aliens in my opinion.
Like sitting a child in front of a television showing him grey “aliens” and repeating the words “alien. alien. from another planet. alien. alien. alien. grey alien.” and then showing up looking like that.
If it were a technology I think they interface with it with their minds. They use it with such speed and sophistication I imagine they would be interfacing with it that way. Their minds work very different than our own based on some of the effects they can create.
Have you heard of neuroscientist Sam Harris? He says our brain processes a thought a few seconds before our conscious minds are aware of it. This could help explain their speed.