He is calmly analytical during his initial attacks on the Mew Mews, scientifically escalating the "mortality rate" of each Chimera Anima he sends and, when they are defeated, noting that "stronger tactics will be needed". Unlike Quiche and Tart, Pie does not outwardly express his emotions often (Except in the last few episodes), rarely smiling even when taunting the Mew Mews and after Deep Blue's awakening. He is the most serious of the aliens and most loyal to Deep Blue, meaning he rarely jokes around in his missions to destroy the Mew Mews. (http://tokyomewmewpower.wikia.com/)