Ai Ebihara is an assistant to the Soccer Team or Basketball Team depending on which team you decide to join at Yasogami High School. She will first appear after reaching Rank 4 in the Strength Social Link. Speak to her again near the shoe lockers on the first floor of Yasogami High to ask her out and begin the Moon Social Link.
Ebi will often persuade you to ditch class, and even bully you into dating her. Rank up the Social Link to get the opportunity to legitimately date her.