Miu Shinonome

Miu is an eccentric girl that likes to speak in riddles. Miu dislikes the fact that her brother, Kaito Shinonome, always interferes with her and so rebels against him. Despite this, she does genuinly care about her brother and doesn't want him to get hurt. Miu's partner Syakomon likes to daydream, and Miu keeps Syakomon grounded. After discovering that her leading them to the shrine is what led to them entering the alternate world, she feels a large amount of guilt, feeling like everything that happened was her fault.

Kaito and Miu often misunderstand each other because Kaito is clumsy at expressing himself. Miu is fascinated with the occult and finds the danger of the alternate World fascinating, having wound up in it after telling Saki Kimishima and the others about the forbidden shrine. Her eccentric behavior confuses the others and throws them off track.

(Source: Digimon Wiki)