Rat is the very definition of ‘hedonistic’. He joined the Cheater’s Core of Necktech just for the pleasure of inflicting pain on his opponents and performing various experiments on his defeated victims via different cards (with the limiters set to 0, this can mean basically anything with how varied different cards are. He’s more or less interested in the mental aspect of torturing someone, enjoying seeing how they react to extreme amounts of stimulation from things that, in reality, are not truly there.