Ayumu Kasuga, known as Osaka, is a transfer student from the city of Osaka and one of the main characters in the Azumanga Daioh series. She is 156 cm (5'1") tall. She was supposedly born in 1983-84. She likes fun facts, word play and fruit juice, and hates spicy food and carbonated drinks. She's good at singing and puzzle-solving, but struggles with most school subjects. She is allergic to pollen and sneezes loudly. She thinks it's lucky to split chopsticks cleanly. She may be neurodivergent.