Kaja Bergmann

Оригінальне ім’я: カヤ・バーグマン

Another ghost from Arashi's time and her best friend. She was an exchange student from Germany who studied at her school. Her polite and cool demeanor opposes to Arashi's lively and carefree personality. She possesses the same time traveling powers as her, but she can only make a connection with a living girl. (source: Wikipedia)