Well, I kind of have my theories about that Hand. Once I get my "Hand of Galochio" story up, you'll see what those theories are.
Now, if he's a room with a memory, I don't think he should be affected by the hand at all, sort of making himself like a ghost that can't be seen, heard or touched. (The ability to go through things on that part of the mind...sweetness.)
Speaking of Raz's mind...I wanna see what Raz looks like at about...oh, age 5?
The sounds of waves crashed near the shore and a lone girl stood alone, practicing her fighting skills against a fully-animated human dummy made of water. Switchblades in hand, she made her mark almost every time. The last time, however, was a miss that got her send back flying.
"Great, I'm being kicked by a creature I made with my own Hydrokinesis," she muttered before getting back up on her feet, returning the dummy to the ocean.