The self-proclaimed "Boss" (i.e. president) of Club Problem Solver 68, Aru puts on airs and pretends to have the attitude of a bigshot boss. She can come off as pretentious or pompous to others but has a soft and caring side underneath the cold surface. Aru tries to be thoughtful while also being haughty but her lack of knowledge and experience makes it easy for her exterior to crumble. In some ways, she is just like many students her age - putting on a show to hide her softer and naïve side.