Takebayashi is mostly a quiet person. However, he seems somewhat eccentric in his behavior and stands out as the oddball in the class. He also seems to be clumsy at physical activity, having ping pong balls hit his glasses while playing with others and nearly losing balance in one of Tadaomi Karasuma's lessons. He initially wanted to leave Class E and seemed ashamed to be in the class but decided to stay when he realized how much his class and Korosensei cared for him and vice versa. He is also obsessed with anime, at one point stating "A girl isn't a true girl until she loses the third D" implying he likes anime girls more than real women. He also enjoys going to maid cafes.