Since he is one of the antagonists of the series, Tubee can be oftentimes mean to his peers. He, as well as Usop and Yumyum, could be seen as school bullies, making fun of their classmates and, for the most part, being pretty mean spirited. However, as shown in a few episodes of the show, Tubee also has a soft side that mostly comes out when he isn't around Usop and Yumyum.