When Tohka first appeared on Earth, on the 10th of April, she came under attack by the AST. That was also the same day Shido encountered Tohka and later discovered the real reason behind the spacequake incidents. The next time Tohka encountered Shido, she was again under attack by the AST. During Tohka and Shido’s short conversation on their second encounter, Shido gave Tohka her name. During their third meeting in which they went out on a date, Tohka and Shido established a bond, as the boy explained to the Spirit that not all humans were like the AST, who are out to kill her. It was during this time after their date got interrupted by the AST that Tohka had her powers sealed by kissing Shido for the first time.