Solus looked up from the Endless Witch, feeling someone percieving him. He subtelly alters both the perception of himself and the memory of himself, removing himself from the scene in their mind. To the one observing, he had never been there at all. Of course, the human mind would automatically compensate for this sudden change, filling in the gaps, as was only natural. Humans only see what they wish to see, not what is truly in front of them, and Solus used this to his full advantage, allowing the scene before him to play out as if he had never been there.