Yasuhiro is one of the more cheery, laid-back students, though a bit odd as well. However, he is generally not well-liked and he himself has openly admitted that he has no friends, being quite cowardly, lazy, slow-witted, and having a habit to act selfishly. Notably, he is mentioned to be very clumsy with money and he has constant problems with massive debts. This trait is especially apparent when he stated that he bought his crystal ball (which is made of glass instead of crystal) at the price of 100 million yen due to it being used by Napoleon, Genghis Khan, and George Washington in the past.