Kaidou Sora

Sora Kaidou (海藤 空, かいどう そら lit. ) is Shun's little sister.

Appearance
Sora has shoulder length that has wavy ends and bangs secured with hairpins that forms an x. She wears eyeglasses like her mother. Sora was first seen wearing an overall dress with a collared shirt.

Personality
Sora is a rather serious person particularly when it comes to academics. She appears to be short-tempered and scary like her mom, threatening Shun when he is being too loud and interrupting her studying.

Trivia

 * Toki 時 means time, and Sora　空 means sky (or empty), but when 空 is combined with the character 間 it becomes kuukan 空間 meaning “space” (like physical space, not outer　space)- so when you put their names together (with the kaidou -> kan idou) you get Jikuukan Idou (時空間移動) = travel through time-space (ie another way to say time travel)