Akina is Chiaki's friend who shares candies called Drop with her.
Chiaki and Akina become friends after they find out that both of them love candy. They share lucky drops every day until Chiaki give some to Misato, Akina's crush. Akina gets mad about the odd numbers and throws their lucky candy box with their photo on it. Their friendship slowly drifts apart.
Akina is created by Kenta Shinohara, and she has no information regarding any inspiration used to create her. She first appears in chapter 105 of volume 12 and in episode 44.