A barely-there idea for my first SCP: A humanoid being who exists in all 10 dimensions according to string theory. (A physicist I am not, so I will probably screw something up, but please bear with me.)
Current ideas in the works:
I'd not say the creature is omnipotent - perhaps it's capable of interacting "supernaturally" with its immediate surroundings, much like how an artist can create or alter 2-D images on a canvas despite being three-dimensional. It would be much like interacting with SCP-085, except we are "Cassy" and the creature is the person drawing. However, I am unsure as to just how far its influence should extend from where it is physically manifested.
The SCP is capable of communicating, though its logic is… strange. It can see past, present, and future at once, in all possible timelines, meaning it will talk about things that have not happened, or happened hundreds of years ago as if it were going on in the present. Conversations are often derailed, or entirely nonsensical - sometimes it will speak to people who are not even there, or not respond at all - perhaps talking to someone in another time line? Interactions are disconcerting; the SCP is calm at all times, yet seems… off, its tone and accent (or lack of one) sound like someone obviously not used to making such base noises as human speech. (Half-Life fans can think of the G-Man and see what I'm getting at.)
The SCP has an unnerving way of moving - much of the time it will move like a normal person - fluidly and entirely visible. However, should it will to do so, or perhaps completely at random, the SCP can "shift" through space dramatically, suddenly jerking to its intended position or destination as if it were teleported, or even "split" and do two separate actions at once, like give both a thumbs-up and thumbs-down with the same arm simultaneously, or move to separate ends of the room, then jerk back into a single entity. At no time does it notice this behavior.
More to come, perhaps. Questions/comments/ridicule/constructive criticism?