The problem with hollowing, or hallowing as some call it, is that it's like putting up plaster over an ants' nest and hoping they won't tunnel through. It works along the same principles of reincarnation, but you don't get a brand spanking new body.
You also are at the mercy of whoever's hollowed you. I can hollow, but I'm not so good at making a new person. The seeds of a new personality must be planted and helped to grow. Hmmm, maybe a better analogy would be a garden plot that's had the black spot and you tote in new soil to plant your tomatoes, but the fungus is still down there, waiting for the roots to find it.
Anyway, I've come to the conclusion that someone hollowed Dodgy a long, long time ago. So he's had a long time to reinforce his current personality with memories. But whoever did it, and I'm thinking it was the Assassin since there's no reason to think anyone else would do something like this, he did something I've never seen before.
Hollowing is kind of a misnomer. The memories never go away, they're just covered up and replaced. A real master of this kind of thing can actually use real memories to reinforce the new personality. It's like breaking a plate and using the pieces to make a mosaic... it's not a plate any more; it's something new. But pieces of the plate are still there and the mosaic wouldn't be the same without them.
So Dodgy got hollowed and slapped with a new (obnoxious) personality. Then the Assassin took an extra step and put this thought eating thing in his head so that if Dodgy thinks too hard about the missing pieces in his mosaic, this "jellyfish fog monster" will eat his concerns. And the more he presses, the more riled it gets until it's not just removing his confusion; it starts taking out thoughts and then the memories that inspired those thoughts. It's got "stingers" all through his mind that I hadn't noticed before. If he thinks too hard in a direction it doesn't like, it adjusts him. No wonder I wasn't getting anywhere with my tortures.
I don't know what do about this thing. It's like his mind is booby trapped. I press too hard, it'll turn his brain to mush. I wonder if the Assassin did this just in case he was ever captured, Maybe Dodgy has secrets we could use against his master.
I'm going to have to talk to Mercury about this. He might have some ideas.