Ayumu Kasuga, more popularly known as Osaka is the most eccentric of the schoolgirls yet one of the most iconic. Mild-mannered and quiet, Osaka is often seen as absentminded to others. Though, Osaka has an affinity for fun facts, riddles, and sea animals which adds to her intrigue. She is often paired with Chiyo-chan, in which Osaka is fascinated with the properties of Chiyo-chan’s pigtails. Osaka is a member of the knuckleheads alongside Tomo and Kagura, a group comprised of the lowest scoring schoolgirls. Osaka is considered to be the most iconic of the schoolgirls, and her cultural influence shows.