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 real crystal) at the price of 100 million yen due to it being used by Napoleon, Genghis Khan, and George Washington in the past. He has also bought multiple items related to fortune-telling, despite not actually having any use for them. He tends to talk absurdly about subjects such as conspiracy theories and the one time aliens stole his hamburger. However, he really hates it if someone compares his fortune-telling to the occult, frequently insisting that they are not the same. He is also afraid of ghosts and would freak out if such a subject comes up in a conversation. Whenever he "senses" one, he swiftly recites a chant, casts a spell or begs for help from a hero, a god or a famous person (often random, even multiple ones). Even furthermore, he is stated to be absolutely horrible with women and has a bad hygiene, claiming that he washes his hair once a season.

Voice reference: https://www.youtube.com/watch?v=iwKn1pVtI6Q