Sayoko Arashiyama  

Arashi, 嵐山 小夜子

In the Ark, Hajime's first friend is named Arashi. They have a strong bond due to their frequent playtime together in the village, going on adventures, and performing silly skits that amuse them but confuse others. Arashi possesses a great sense of humor and stands firm in what she believes is right. She shares a close friendship with Kaja. Despite her forgetfulness and lack of responsibility, Arashi does not hesitate to act impulsively without considering the consequences of her actions.