Keeping my smile on

Written after the fallout of Episode 10, but through the blue eyes of Ai Shindou and taking place first during Episode 2, and then later the overlapping Episodes 8 and 9. When Ai first met Mirai Kuriyama, what could she have been thinking? And what did she think when the same Spirit World Warrior suddenly disappeared after defeating the youmu dwelling inside Akihito Kanbara?