Asuka is a female classmate of Daichi's who the latter has a crush on. Asuka believes in spirits because her grandmother passed away prior to the story's beginning and she felt that her grandmother's spirit was still around. When Daichi takes photos of the mansion, she's happy and even after they are found to be fake, she still is thankful for the gesture Daichi made to cheer her up. Later in the series, she marries Daichi, and makes an appearance as an adult in episode 7.

(Source: Wikipedia)