Aiko (アイ子) is a supporting character in Only Yesterday, voiced in Japanese by Mei Oshitani. The series' music includes "Only Yesterday - Omoide Poro Poro - Ending - The Rose - Ai wa Hana, Kimi wa Sono Tane", "Only Yesterday - Omoide Poro Poro - Ending - The Rose - Ai wa Hana, Kimi wa Sono Tane".
