Ashino Kuniko (芦野久仁子 Ashino Kuniko, あしの くにこ Ashino Kuniko) is a first year student of Nekketsu High School. Her debut appearance in the Kunio-kun franchise is in Downtown Nekketsu Baseball Monogatari: Yakyū de Shōbu da! Kunio-kun. She takes over Rika's place as team manager of Nekketsu High's Baseball team. She is also Kunio's biggest fan and chases him whenever the opportunity arises. She has a rivalry with Hasebe.
She also appears in Downtown Nekketsu Monogatari EX.
- In River City Ransom EX, she is renamed Shel.