I don't want to say bad common sense, as he would be fully aware of the possible consequences of his actions and wouldn't do ridiculous stunts for the sake of doing them. But, whereas Urkwia is bookish and keeps to herself, my character would like to indulge in social events and wouldn't hesitate to help a friend, even if that means getting in a bit of trouble. Also, while Urkwia seems to be motivated mostly by scientific (or in this case magical) curiosity, my character would be motivated by a simpler sense of adventure. By the way, what age were you planning on making these characters?